The book is a nice in-depth look at the carnivorous plants that are native to the United States and Canada. The coverage is expecially thorough for Sarracenia, although still adequate (and probably more extensive than any other book available) on Drosera and Pinguicula.
The pictures included are mostly excellent, showing the plants in habitat when possible, instead of just using cultivated plants. And although the distribution maps may be a bit dated, they are helpful to understand the general areas where the plants might be found. Also, included with each section is some basic cultivation advice that I've found very helpful.
This isn't a book for a novice grower of carnivorous plants, but rather for someone who's been growing them for a while and wants more information on their native habitats and environments, as well as more technical information on each plant. An excellent book.