Free Python Programming books

This time I came across one free python programming books site.
Three free books on python and object oriented programming are provided on this site.

http://homepage.mac.com/s_lott/books/nonprogrammer.html
Its a basic(python) tutorial for beginners.

http://homepage.mac.com/s_lott/books/python.html
A comprehensive python book for experienced programmers.

http://homepage.mac.com/s_lott/books/oodesign.html
Its a book for serious designers.

All three books are in Creative Commons License.