I looked at the book when I was just starting. I ended up putting together my own program from a variety of sources, but it seemed like a good book.
Regarding it being boring, I'm sure every exercise suits some people and not others. But not only that, there is also tremendous variety within yoga, just like there's a huge difference between jogging a few miles a day vs running marathons vs doing intervals and even vs walking. They're all still joggers, except the walker, and Garcia may be more of a "walker." That may bore a "jogger" to death, but if it may be exactly what a couch potato beginner needs. Even if that couch potato eventually runs marathons
Some yoga is quite strenous, but it will still never suit everyone.