[alberto_ol]

If you want a scientific biography, "Subtle is the Lord" by Abraham Pais, but you need a degree in physics to understand many chapters (unfortunately for me a degree in engineering was not enough).

Abraham Pais wrote also "Einstein Lived Here" a non-scientific biography, but I did not read it.

https://en.wikipedia.org/wiki/Subtle_is_the_Lord

[amunozo]

I actually have a degree in Physics but I am not sure it is what I want (I don't remember much :D). But I will take a look. Thanks a lot for both recommendations!