This book is interesting for someone doing a job search because the stories of crazy Microsoft interviews make you feel better about the semi-crazy questions you've been asked. And reading about some of the freak-outs in response to the crazy interview tactics make you feel better about your interview answers, too.
There was less focus on the answers to puzzle questions in this book than I expected. The major thesis is that puzzle questions are actually a really stupid way of judging a person's intelligence. Studies have shown, according to research cited in the book, that there is no correlation between how any person does on any kind of IQ test and how that person performs outside of the test. Engineers should have good minds for solving puzzles, but only an engineering test can accurately judge an individual's engineering capability.
The parts of this book that do give you the answers to puzzle question is laid out in a somewhat confusing manner, but it is really cool reading the answers all the same. Do you know why cans are tapered on the top and bottom? I do.