Books
Here I put a list of books which I can recommend to read for everyone:
Java:
Thinking in Java – Bruce Eckel – link
JavaScript:
JavaScript: The Good Parts – Douglas Crockford - link
JavaScript Patterns – Stoyan Stefanov - link
Test-Driven JavaScript Development – Christian Johansen - link
MySql:
High Performance MySQL – Jeremy D. Zawodny - link
Python:
Beginning Python – many authors – link
Php:
Manual – link
If you also know any interesting position, please share a title in comment.