Whether you're cool with Sourceforge or not these days, this looks interesting at the very least...
Pay What You Want: White Hat Hacker Bundle
Master Penetration Testing with 7 Courses (60+ Hours) on Hacking Node.js Apps, Windows OS, Wi-Fi Devices & More
A whole bundle of penetration testing and general hacker stuff aimed at self-training for white hat hacking.
Looks like 'Pay what you want' only gets you two: Node.js Security and Cross-site Scripting. But beat the average price (currently $12.32) and you get all 7 books on offer ($765 worth).
https://deals.source...te-hat-hacker-bundle 
