hi Ian - yup the book is very nice but also bloody expensive (as you have noticed about 3 weeks after recieving mine I got billed again by fed-ex! no idea what was happening there.... A|W claimed ignorance and havnt heard anything back from them so I had to pay though it was only £16..
anyway back to the book - only possible complaint I have with it is that it is a little too basic and its only 335 pages long. £90 is a hell of a lot to pay for such a thin book thats not to say it doesnt cover some complex setups, but you may find you have to wade through a lot of real easy stuff before you get to the "meat".
one thing definatly worth mentioning - its about 80% rigging and 20% animation so if you were looking at it as more of a lesson in animation then you'd be better off looking at somthing like "The Animators survival toolkit" or "cartoon animation"(preston blair).
maybe worth taking a look on ebay and see if anyone is selling a copy??