The book is very nice. But there are some places with broken code which make the examples pretty useless. Most of the time it's something with % in it. There are (3 month old) comments on those pages who address this, but nothing got changed.
Is there any repository with the source to the book? Some comments said that the code was OK in the source. http://web2py.com/appliances/default/show/59 (Appliance "the web2py book" (#59)) has just 1 example chapter.