How I Made a Hundred Movies in Hollywood and Never Lost a Dime, by Roger Corman, is an interesting look at low budget film making.
If you find many of Corman's films interesting, it's worth a read, because he talks about a lot of them (I suspect that many of them are pretty interchangeable).
One of the things that I never realized about Corman films is how fast they're made. Very often the scripts didn't exist until Corman saw a set that he wanted to use (because it was available cheaply) and would have a story which uses the set written in a week or two. It explains why so many of his films are so bad in so many ways.
That being said, having seen a fair number of Roger Corman films, it is surprising how many of them have at least a few good ideas or a few bits of quality in them. Overall I found the book somewhat interesting and don't regret the money I paid for it or the time I spent reading it.