I bought this because I was having difficulty knowing where to start in stop-motion animation, and also because I really like the movies that Aardman have produced.
The book has a great background and introduction to stop-motion, and goes on to explain some areas of how a stop-motion film is produced. Areas covered included how certain effects are achieved, how the sound is added and lighting set-ups. Things that are not covered include frame-grabbing using a computer, and as most amateur animators start off with webcams and free/cheap frame-grabbing software this should be taken into account if you are a beginner. Hoever, information on frame-grabbing software etc is widely available for free on the internet at sites such as stopmotionanimation.com and animateclay.com.
I found the book very useful, especially the basic exercises using clay to do some simple motions. I also enjoyed reading about how parts of the Wallace and Gromit movies were achieved.
Altogether a very good book for people just getting into stop-mition animation, or anyone interested in how it is done, although if you plan to go into animating on computers you will need to either spend some time on the internet or find another book to cover this aspect of it.