Life of Picasso

I've been researching Picasso's life to get background information on his childhood and the different experiences that he has gone through to become a successful artist. I found a lot of good information which could explain the different emotions that Picasso was feeling throughout his life and what caused him to change his art style more than once.

-http://www.artquotes.net/masters/picasso_biography.htm
-http://www.artelino.com/articles/pablo_picasso.asp
-http://www.abcgallery.com/P/picasso/picassobio.html