I'd check this out before reading that. I haven't read through the book, but I remember the pictures on the free version being all blurry and most example patches not included. The synths he uses are also not super conventional and not free either, with the demo's only lasting like 15 minutes or something.
Synth Secrets is aimed a biiiit more at using analog stuff, but only a bit. Most if not all of the concepts the series goes over can be applied to digital synths as well. 1st half is mostly conceptual stuff and explanations, the second half goes into synthesizing mostly real world instrument sounds. Highly recommended, goes over almost everything you need to know from the ground up, and it's free!