Added book: Practical Cryptography for Developers (#70)

* Added book: Practical Cryptography for Developers

Added the free ebook "Practical Cryptography for Developers": https://cryptobook.nakov.com

* Ordered the books alphabetically

README.md

@@ -97,6 +97,7 @@ A curated list of cryptography resources and links.
 - [Handbook of Applied Cryptography](http://cacr.uwaterloo.ca/hac/index.html) - This book is intended as a reference for professional cryptographers.
 - [Introduction to Modern Cryptography](http://www.cs.umd.edu/~jkatz/imc.html) - Introductory-level treatment of cryptography written from a modern, computer science perspective.
 - [OpenSSL Cookbook](https://www.feistyduck.com/library/openssl-cookbook/) - The book about OpenSSL.
+- [Practical Cryptography for Developers](https://cryptobook.nakov.com) - Developer-friendly book on modern cryptography (hashes, MAC codes, symmetric and asymmetric ciphers, key exchange, elliptic curves, digital signatures) with lots of code examples.
 - [Security Engineering](http://www.cl.cam.ac.uk/~rja14/book.html) - There is an extraordinary textbook written by Ross Anderson, professor of computer security at University of Cambridge.
 - [Serious Cryptography](https://nostarch.com/seriouscrypto) - A Practical Introduction to Modern Encryption by Jean-Philippe Aumasson.
 - [The Cryptoparty Handbook](https://unglue.it/work/141611/) - This book provides a comprehensive guide to the various topics of the computer and internet security.