1 "Network Security Essentials: Applications and Standards" by William Stallings

2 "Applied Cryptography: Protocols, Algorithms, and Source Code in C" by Bruce Schneier

3 "Hacking: The Art of Exploitation" by Jon Erickson

4 "The Web Application Hacker's Handbook" by Dafydd Stuttard and Marcus Pinto

5 "Practical Network Security: Planning, Techniques, and Tools" by Terry Chapman and Emily Whitman

6 "Network Security with OpenSSL" by John Viega, Matt Messier, and Pravir Chandra

7 "Metasploit: The Penetration Tester's Guide" by David Kennedy, Jim O'Gorman, Devon Kearns, and Mati Aharoni

8 "Cybersecurity and Cyberwar: What Everyone Needs to Know" by P.W. Singer and Allan Friedman