Seems to me to be two different books, intimately intertwined into just one. One book describes in considerable detail -even with exercises- how to both create and market your own animations. The other is a survey/overview of _many_ of the best animators worldwide (mostly in the last quarter century). It's very thorough; it lists people whose names I've never seen anywhere else, and has lots of stills from their best animations.
I particularly appreciated the author's use of a very broad definition of "what's animation?". This is not just about cel and multiplane or 3D modelling or ... - it includes as equals many less common techniques too: paper cutouts, silhouettes, pixilation, marking directly on the film, and so forth.
Writing style is very business-like. It's not a "chore" to read, but it's certainly not a page-turner either. It could probably be treated as a reference book rather than a linear read.