cant belive it has taken 24 hours for you to get a response for this

A good book that I used was "how to make a noise", it is a few years old now, but dont let that put you off as the principales are still the same.

There is a free pdf for download on the authors page, the link for the free stuff is half way down.

How to Make a Noise: A Comprehensive Guide to Synthesizer Programming | Noise Sculpture dot com