Easy Riders and Raging Bulls (How the Sex-Drugs-and-Rock 'n' Roll Generation Saved Hollywood) by Peter Biskind. One of the best books about Hollywood ever written.
The story of how the new generation of movie-brat directors (Hopper, Fonda, Lucas, Altman, Speilberg, DePalma, Coppola, Scorcese) came to dominate Hollywood in the '70s. A fascinating read.
Shock Value by John Waters. One of the funniest books about movie making (and other strange stuff) ever. Stayed up all night and read it in one go. Definitely comes under "cult".