Just stumbled across a free e-book on sound design/synth programming, titled “How to Make a Noise: A Comprehensive Guide to Synthesizer Programming“. I haven’t read a lot of it yet, but will be poring over it eventually. Even though there’s a more complete retail version of it that comes with patches to download outside of the ones for Chapter 1, I would think that anyone could gain at least something from checking out the free version. Have at it!