This book is really useful for slotting a puzzle into an adventure or campaign when you can't or don't want to think of your own. I tried out one of the puzzles on my group and they really enjoyed working it out. The puzzles are not too difficult so that a group would get stuck but offer enough of a brain teaser to make the players think. I really like the options to make them easier with extra clues if needed. The illustrations also make it easy to understand how the puzzles work.