This was a classic, must-read book back in the day .. but these days, I think that Loopops Incomplete Guide of Electronic Music Ideas, Tips and Tricks is a better investment of ones time. Its just more broadly applicable and far more dense in terms of tooling and methodology.

https://www.docdroid.net/3K4UL8i/loopop-toc-pdf

In general, screeds documenting the theory and technique of electronic music would be better served if their authors didn't orient the works around a particular tool or method - such as Puredata, in this case. Even those PD is indeed an extremely powerful tool, its not really all-encompassing when it comes to making Electronic Music - its a digital tool, and electronic music covers the gamut from analog to digital and beyond...