And I was slightly disappointed that I was only caught out by one of the puzzles (Puzzle 49: Larger Than Life.) The rest I figured out in 20 seconds or less. That's only one out of 9 that I learned anything from. So if that's a representative sample then I probably won't buy the book. Unless someone who has a copy can tell me that most of the puzzles are harder.
Mind you I have been coding in Java for 12 years now - maybe the target audience is developers with less experience than that.