This book contains an excellent collection of algorithmic puzzles. There are lots (150) of puzzles in three difficulty categories. The book itself has 3 parts - the puzzle, the hint(s), and the solution explanation with references and a short history. The conversion to Kindle format was done poorly. You would have thought they could puzzle out that the three parts of the book should be linked so the reader can move back and forth. This is especially problematic as neither of the three sections can stand alone. The Pounstone books, Are You Smart Enough to Work at Google?: Trick Questions, Zen-like Riddles, Insanely Difficult Puzzles, and Other Devious Interviewing Techniques You Need ... to Get a Job Anywhere in the New Economy and How Would You Move Mount Fuji?: Microsoft's Cult of the Puzzle - How the World's Smartest Companies Select the Most Creative Thinkers are referenced in the book and they got the connectivity correct. I would recommend the paper version of the book with 3 book marks. Fixing this frustration would raise my rating to 5 stars.
The above Poundstone books do have a small overlap with this book, however they are sufficiently different that purchasing all three books is not a bad idea.