It is famous for being Richard Feynman's favorite calculus book.
http://www.scribd.com/doc/139749115/1-Arithmetic-for-the-Pra...
http://www.scribd.com/doc/88264564/Algebra-for-the-Practical...
http://www.scribd.com/doc/88269362/Trigonometry-for-the-Prac...
I can't find one for Geometry for the Practical Man