Books
Web and browser
Web Hacking 101 by Peter Yaworski.
The Web Application Hacker’s Handbook: Finding and Exploiting Security Flaws by Dafydd Stuttard and Marcus Pinto.
Tangled Web by Michal Zalewski.
OWASP Testing Guide v4 by OWASP Breakers community.
Mobile
The Mobile Application Hacker's Handbook by Dominic Chell et al.
Cryptography
Crypto 101 by Laurens Van Houtven.
Penetration Testing
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