From developper to data scientist I code a lot for web, games and some basic ML scripts. Now I would like to learn about data science.

This post is a good starting point but I would like some readings. I would like advices on books for a beginner (maths, tools, whatever).

I've found these ones from O'Reilly : 


Machine Learning for Hackers, By Drew Conway, John Myles White
Agile Data Science, By Russell Jurney
R Cookbook, By Paul Teetor


(Sorry, my reputation is too low to let me post more than 1 link haha)

Do you recommand these readings ? Are there other must-reading books ?

Thanks.
I suggest this guide for a good introduction to the resources available to you to learn to do data science. You are starting at a good time, there are loads of excellent (and mostly free) resources to teach you this interesting field.