The Book of GIMP: A Complete Guide to Nearly Everything
olivier lecarme & Karine Delvare
Serious Cryptography: A Practical Introduction to Modern Encryption
Jean-Philippe Aumasson
Threat Modeling: Designing for Security
Adam Shostack
The GNU Make Book
john graham-cumming
Salesforce Advanced Administrator Certification Guide
Enrico Murru
Salesforce Platform Developer I Certification Guide
Jan Vandevelde