diff --git a/chapter1/.DS_Store b/chapter1/.DS_Store
index b0a6ddb..23c7a35 100644
Binary files a/chapter1/.DS_Store and b/chapter1/.DS_Store differ
diff --git a/chapter1/bench-test/Cargo.lock b/chapter1/bench-test/Cargo.lock
deleted file mode 100644
index cb164a9..0000000
--- a/chapter1/bench-test/Cargo.lock
+++ /dev/null
@@ -1,5 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-[[package]]
-name = "bench-test"
-version = "0.1.0"
diff --git a/chapter1/bench-test/Cargo.toml b/chapter1/bench-test/Cargo.toml
deleted file mode 100644
index 62dc867..0000000
--- a/chapter1/bench-test/Cargo.toml
+++ /dev/null
@@ -1,9 +0,0 @@
-[package]
-name = "bench-test"
-version = "0.1.0"
-authors = ["peshwar9 <par.esh1937@gmail.com>"]
-edition = "2018"
-
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
-
-[dependencies]
diff --git a/chapter1/bench-test/src/lib.rs b/chapter1/bench-test/src/lib.rs
deleted file mode 100644
index 9f15317..0000000
--- a/chapter1/bench-test/src/lib.rs
+++ /dev/null
@@ -1,27 +0,0 @@
-#![feature(test)]
-
-extern crate test;
-
-pub fn get_fact(n: u64) -> u64 {
-    if n < 2 {
-        1
-    } else {
-        n * get_fact(n - 1)
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use test::Bencher;
-
-    #[test]
-    fn it_works() {
-        assert_eq!(120, get_fact(5));
-    }
-
-    #[bench]
-    fn bench_get_fact(b: &mut Bencher) {
-        b.iter(|| get_fact(1234571));
-    }
-}
diff --git a/chapter1/bench-test/src/main.rs b/chapter1/bench-test/src/main.rs
deleted file mode 100644
index e7a11a9..0000000
--- a/chapter1/bench-test/src/main.rs
+++ /dev/null
@@ -1,3 +0,0 @@
-fn main() {
-    println!("Hello, world!");
-}
diff --git a/chapter1/dep-example/.DS_Store b/chapter1/dep-example/.DS_Store
deleted file mode 100644
index 5008ddf..0000000
Binary files a/chapter1/dep-example/.DS_Store and /dev/null differ
diff --git a/chapter1/bench-test/.DS_Store b/chapter1/deps-example/.DS_Store
similarity index 100%
rename from chapter1/bench-test/.DS_Store
rename to chapter1/deps-example/.DS_Store
diff --git a/chapter1/dep-example/Cargo.lock b/chapter1/deps-example/Cargo.lock
similarity index 98%
rename from chapter1/dep-example/Cargo.lock
rename to chapter1/deps-example/Cargo.lock
index b6bd847..289dbbd 100644
--- a/chapter1/dep-example/Cargo.lock
+++ b/chapter1/deps-example/Cargo.lock
@@ -18,7 +18,7 @@ dependencies = [
 ]
 
 [[package]]
-name = "dep-example"
+name = "deps-example"
 version = "0.1.0"
 dependencies = [
  "chrono",
diff --git a/chapter1/dep-example/Cargo.toml b/chapter1/deps-example/Cargo.toml
similarity index 71%
rename from chapter1/dep-example/Cargo.toml
rename to chapter1/deps-example/Cargo.toml
index 1222dcc..330aa42 100644
--- a/chapter1/dep-example/Cargo.toml
+++ b/chapter1/deps-example/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
-name = "dep-example"
+name = "deps-example"
 version = "0.1.0"
-authors = ["peshwar9 <par.esh1937@gmail.com>"]
+authors = ["peshwar9"]
 edition = "2018"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
diff --git a/chapter1/dep-example/src/main.rs b/chapter1/deps-example/src/main.rs
similarity index 100%
rename from chapter1/dep-example/src/main.rs
rename to chapter1/deps-example/src/main.rs
diff --git a/chapter1/feature-test/.DS_Store b/chapter1/feature-test/.DS_Store
deleted file mode 100644
index 5008ddf..0000000
Binary files a/chapter1/feature-test/.DS_Store and /dev/null differ
diff --git a/chapter1/feature-test/Cargo.lock b/chapter1/feature-test/Cargo.lock
deleted file mode 100644
index 2249d11..0000000
--- a/chapter1/feature-test/Cargo.lock
+++ /dev/null
@@ -1,5 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-[[package]]
-name = "feature-test"
-version = "0.1.0"
diff --git a/chapter1/feature-test/Cargo.toml b/chapter1/feature-test/Cargo.toml
deleted file mode 100644
index 35c27ca..0000000
--- a/chapter1/feature-test/Cargo.toml
+++ /dev/null
@@ -1,16 +0,0 @@
-[package]
-name = "feature-test"
-version = "0.1.0"
-authors = ["peshwar9 <par.esh1937@gmail.com>"]
-edition = "2018"
-
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
-
-[[bin]]
-name = "featuretest"
-path = "src/main.rs"
-
-[features]
-feature1 = []
-
-[dependencies]
diff --git a/chapter1/feature-test/src/lib.rs b/chapter1/feature-test/src/lib.rs
deleted file mode 100644
index 814b4bf..0000000
--- a/chapter1/feature-test/src/lib.rs
+++ /dev/null
@@ -1,19 +0,0 @@
-#[cfg(feature = "feature1")]
-pub use self::with_feature_config::execute;
-
-#[cfg(not(feature = "feature1"))]
-pub use self::without_feature_config::execute;
-
-#[cfg(feature = "feature1")]
-mod with_feature_config {
-    pub fn execute() {
-        println!("Executing feature 1");
-    }
-}
-
-#[cfg(not(feature = "feature1"))]
-mod without_feature_config {
-    pub fn execute() {
-        println!("Not executing feature 1")
-    }
-}
diff --git a/chapter1/feature-test/src/main.rs b/chapter1/feature-test/src/main.rs
deleted file mode 100644
index ba7935b..0000000
--- a/chapter1/feature-test/src/main.rs
+++ /dev/null
@@ -1,5 +0,0 @@
-use feature_test::execute;
-
-fn main() {
-    execute();
-}
diff --git a/chapter1/first-program/Cargo.toml b/chapter1/first-program/Cargo.toml
index cdefca9..c1dd125 100644
--- a/chapter1/first-program/Cargo.toml
+++ b/chapter1/first-program/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "first-program"
 version = "0.1.0"
-authors = ["peshwar9 <par.esh1937@gmail.com>"]
+authors = ["peshwar9"]
 edition = "2018"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
diff --git a/chapter1/integ-test-example/Cargo.toml b/chapter1/integ-test-example/Cargo.toml
index add807f..2455c17 100644
--- a/chapter1/integ-test-example/Cargo.toml
+++ b/chapter1/integ-test-example/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "integ-test-example"
 version = "0.1.0"
-authors = ["peshwar9 <par.esh1937@gmail.com>"]
+authors = ["peshwar9"]
 edition = "2018"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
diff --git a/chapter1/integ-test-example/doc/itest.html b/chapter1/integ-test-example/doc/itest.html
index 985c315..699151b 100644
--- a/chapter1/integ-test-example/doc/itest.html
+++ b/chapter1/integ-test-example/doc/itest.html
@@ -31,7 +31,7 @@
 
 <span class="kw">use</span> <span class="ident">integ_test_example</span>;
 
-<span class="kw">fn</span> <span class="ident">get_id</span>() <span class="op">-</span><span class="op">&gt;</span> <span class="ident">i32</span> {
+<span class="kw">fn</span> <span class="ident">get_id</span>()  {
  <span class="kw">let</span> <span class="ident">my_pid</span> <span class="op">=</span> <span class="ident">get_process_id</span>();
  <span class="macro">println</span><span class="macro">!</span>(<span class="string">&quot;Process id for current process is: {}&quot;</span>, <span class="ident">my_pid</span>);    
 }
diff --git a/chapter1/my-first-lib/Cargo.toml b/chapter1/my-first-lib/Cargo.toml
index 996a460..b37c8b8 100644
--- a/chapter1/my-first-lib/Cargo.toml
+++ b/chapter1/my-first-lib/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "my-first-lib"
 version = "0.1.0"
-authors = ["peshwar9 <par.esh1937@gmail.com>"]
+authors = ["peshwar9"]
 edition = "2018"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
diff --git a/chapter1/test-example/Cargo.toml b/chapter1/test-example/Cargo.toml
index c8451ea..7427122 100644
--- a/chapter1/test-example/Cargo.toml
+++ b/chapter1/test-example/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "test-example"
 version = "0.1.0"
-authors = ["peshwar9 <par.esh1937@gmail.com>"]
+authors = ["peshwar9"]
 edition = "2018"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
diff --git a/chapter1/test-example/target/rls/.rustc_info.json b/chapter1/test-example/target/rls/.rustc_info.json
new file mode 100644
index 0000000..69bc71d
--- /dev/null
+++ b/chapter1/test-example/target/rls/.rustc_info.json
@@ -0,0 +1 @@
+{"rustc_fingerprint":4503571881771466578,"outputs":{"1164083562126845933":["rustc 1.43.0 (4fb7144ed 2020-04-20)\nbinary: rustc\ncommit-hash: 4fb7144ed159f94491249e86d5bbd033b5d60550\ncommit-date: 2020-04-20\nhost: x86_64-apple-darwin\nrelease: 1.43.0\nLLVM version: 9.0\n",""],"4476964694761187371":["___\nlib___.rlib\nlib___.dylib\nlib___.dylib\nlib___.a\nlib___.dylib\n/Users/prabhueshwarla/.rustup/toolchains/stable-x86_64-apple-darwin\ndebug_assertions\nproc_macro\ntarget_arch=\"x86_64\"\ntarget_endian=\"little\"\ntarget_env=\"\"\ntarget_family=\"unix\"\ntarget_feature=\"fxsr\"\ntarget_feature=\"sse\"\ntarget_feature=\"sse2\"\ntarget_feature=\"sse3\"\ntarget_feature=\"ssse3\"\ntarget_os=\"macos\"\ntarget_pointer_width=\"64\"\ntarget_vendor=\"apple\"\nunix\n",""]},"successes":{}}
\ No newline at end of file
diff --git a/chapter1/test-example/target/rls/debug/.cargo-lock b/chapter1/test-example/target/rls/debug/.cargo-lock
new file mode 100644
index 0000000..e69de29
diff --git a/chapter1/test-example/target/rls/debug/.fingerprint/test-example-1aff5c91933770bc/bin-test_example-1aff5c91933770bc b/chapter1/test-example/target/rls/debug/.fingerprint/test-example-1aff5c91933770bc/bin-test_example-1aff5c91933770bc
new file mode 100644
index 0000000..ede91c5
--- /dev/null
+++ b/chapter1/test-example/target/rls/debug/.fingerprint/test-example-1aff5c91933770bc/bin-test_example-1aff5c91933770bc
@@ -0,0 +1 @@
+970e2e628c155d7e
\ No newline at end of file
diff --git a/chapter1/test-example/target/rls/debug/.fingerprint/test-example-1aff5c91933770bc/bin-test_example-1aff5c91933770bc.json b/chapter1/test-example/target/rls/debug/.fingerprint/test-example-1aff5c91933770bc/bin-test_example-1aff5c91933770bc.json
new file mode 100644
index 0000000..7b6eafa
--- /dev/null
+++ b/chapter1/test-example/target/rls/debug/.fingerprint/test-example-1aff5c91933770bc/bin-test_example-1aff5c91933770bc.json
@@ -0,0 +1 @@
+{"rustc":12217307662193597186,"features":"[]","target":16120433538194145899,"profile":14891217944882224483,"path":1036222786711178230,"deps":[],"local":[{"CheckDepInfo":{"dep_info":"debug/.fingerprint/test-example-1aff5c91933770bc/dep-bin-test_example-1aff5c91933770bc"}}],"rustflags":[],"metadata":13779719443416291531}
\ No newline at end of file
diff --git a/chapter1/test-example/target/rls/debug/.fingerprint/test-example-1aff5c91933770bc/dep-bin-test_example-1aff5c91933770bc b/chapter1/test-example/target/rls/debug/.fingerprint/test-example-1aff5c91933770bc/dep-bin-test_example-1aff5c91933770bc
new file mode 100644
index 0000000..cdefce3
Binary files /dev/null and b/chapter1/test-example/target/rls/debug/.fingerprint/test-example-1aff5c91933770bc/dep-bin-test_example-1aff5c91933770bc differ
diff --git a/chapter1/test-example/target/rls/debug/.fingerprint/test-example-1aff5c91933770bc/invoked.timestamp b/chapter1/test-example/target/rls/debug/.fingerprint/test-example-1aff5c91933770bc/invoked.timestamp
new file mode 100644
index 0000000..e00328d
--- /dev/null
+++ b/chapter1/test-example/target/rls/debug/.fingerprint/test-example-1aff5c91933770bc/invoked.timestamp
@@ -0,0 +1 @@
+This file has an mtime of when this was started.
\ No newline at end of file
diff --git a/chapter1/test-example/target/rls/debug/.fingerprint/test-example-b4dba4d825305f9f/dep-test-bin-test_example-b4dba4d825305f9f b/chapter1/test-example/target/rls/debug/.fingerprint/test-example-b4dba4d825305f9f/dep-test-bin-test_example-b4dba4d825305f9f
new file mode 100644
index 0000000..cdefce3
Binary files /dev/null and b/chapter1/test-example/target/rls/debug/.fingerprint/test-example-b4dba4d825305f9f/dep-test-bin-test_example-b4dba4d825305f9f differ
diff --git a/chapter1/test-example/target/rls/debug/.fingerprint/test-example-b4dba4d825305f9f/invoked.timestamp b/chapter1/test-example/target/rls/debug/.fingerprint/test-example-b4dba4d825305f9f/invoked.timestamp
new file mode 100644
index 0000000..e00328d
--- /dev/null
+++ b/chapter1/test-example/target/rls/debug/.fingerprint/test-example-b4dba4d825305f9f/invoked.timestamp
@@ -0,0 +1 @@
+This file has an mtime of when this was started.
\ No newline at end of file
diff --git a/chapter1/test-example/target/rls/debug/.fingerprint/test-example-b4dba4d825305f9f/test-bin-test_example-b4dba4d825305f9f b/chapter1/test-example/target/rls/debug/.fingerprint/test-example-b4dba4d825305f9f/test-bin-test_example-b4dba4d825305f9f
new file mode 100644
index 0000000..a11b15e
--- /dev/null
+++ b/chapter1/test-example/target/rls/debug/.fingerprint/test-example-b4dba4d825305f9f/test-bin-test_example-b4dba4d825305f9f
@@ -0,0 +1 @@
+722ab614c849dc01
\ No newline at end of file
diff --git a/chapter1/test-example/target/rls/debug/.fingerprint/test-example-b4dba4d825305f9f/test-bin-test_example-b4dba4d825305f9f.json b/chapter1/test-example/target/rls/debug/.fingerprint/test-example-b4dba4d825305f9f/test-bin-test_example-b4dba4d825305f9f.json
new file mode 100644
index 0000000..6fbd423
--- /dev/null
+++ b/chapter1/test-example/target/rls/debug/.fingerprint/test-example-b4dba4d825305f9f/test-bin-test_example-b4dba4d825305f9f.json
@@ -0,0 +1 @@
+{"rustc":12217307662193597186,"features":"[]","target":16120433538194145899,"profile":1647870076477133176,"path":1036222786711178230,"deps":[],"local":[{"CheckDepInfo":{"dep_info":"debug/.fingerprint/test-example-b4dba4d825305f9f/dep-test-bin-test_example-b4dba4d825305f9f"}}],"rustflags":[],"metadata":13779719443416291531}
\ No newline at end of file
diff --git a/chapter1/test-example/target/rls/debug/deps/libtest_example-1aff5c91933770bc.rmeta b/chapter1/test-example/target/rls/debug/deps/libtest_example-1aff5c91933770bc.rmeta
new file mode 100644
index 0000000..e69de29
diff --git a/chapter1/test-example/target/rls/debug/deps/libtest_example-b4dba4d825305f9f.rmeta b/chapter1/test-example/target/rls/debug/deps/libtest_example-b4dba4d825305f9f.rmeta
new file mode 100644
index 0000000..e69de29
diff --git a/chapter1/test-example/target/rls/debug/deps/save-analysis/test_example-1aff5c91933770bc.json b/chapter1/test-example/target/rls/debug/deps/save-analysis/test_example-1aff5c91933770bc.json
new file mode 100644
index 0000000..a98234d
--- /dev/null
+++ b/chapter1/test-example/target/rls/debug/deps/save-analysis/test_example-1aff5c91933770bc.json
@@ -0,0 +1 @@
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diff --git a/chapter1/test-example/target/rls/debug/deps/save-analysis/test_example-b4dba4d825305f9f.json b/chapter1/test-example/target/rls/debug/deps/save-analysis/test_example-b4dba4d825305f9f.json
new file mode 100644
index 0000000..da06aca
--- /dev/null
+++ b/chapter1/test-example/target/rls/debug/deps/save-analysis/test_example-b4dba4d825305f9f.json
@@ -0,0 +1 @@
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\ No newline at end of file
diff --git a/chapter1/test-example/target/rls/debug/deps/test_example-1aff5c91933770bc.d b/chapter1/test-example/target/rls/debug/deps/test_example-1aff5c91933770bc.d
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--- /dev/null
+++ b/chapter1/test-example/target/rls/debug/deps/test_example-1aff5c91933770bc.d
@@ -0,0 +1,5 @@
+/Users/prabhueshwarla/rust/author/packt/code/prod/chapter1/test-example/target/rls/debug/deps/test_example-1aff5c91933770bc.rmeta: src/main.rs
+
+/Users/prabhueshwarla/rust/author/packt/code/prod/chapter1/test-example/target/rls/debug/deps/test_example-1aff5c91933770bc.d: src/main.rs
+
+src/main.rs:
diff --git a/chapter1/test-example/target/rls/debug/deps/test_example-b4dba4d825305f9f.d b/chapter1/test-example/target/rls/debug/deps/test_example-b4dba4d825305f9f.d
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--- /dev/null
+++ b/chapter1/test-example/target/rls/debug/deps/test_example-b4dba4d825305f9f.d
@@ -0,0 +1,5 @@
+/Users/prabhueshwarla/rust/author/packt/code/prod/chapter1/test-example/target/rls/debug/deps/test_example-b4dba4d825305f9f.rmeta: src/main.rs
+
+/Users/prabhueshwarla/rust/author/packt/code/prod/chapter1/test-example/target/rls/debug/deps/test_example-b4dba4d825305f9f.d: src/main.rs
+
+src/main.rs:
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diff --git a/chapter1/test-example/tests/integration_test1.rs b/chapter1/test-example/tests/integration_test1.rs
deleted file mode 100644
index d243261..0000000
--- a/chapter1/test-example/tests/integration_test1.rs
+++ /dev/null
@@ -1,7 +0,0 @@
-use my-process-lib;
-
-    #[test]
-    fn test_if_process_id_is_returned() {
-        assert_eq!(get_process_id(), 0, "There is error in code");
-        println!("Hello from integration test")
-    }