Whilst good in concept, this book frustratingly contains multiple typos and mistakes that make many of the puzzles either impossible to solve, or have multiple correct answers. The printing errors become obvious when you compare the puzzles with the solutions at the back. I've tried 20 puzzles, and 4 have errors. Extrapolating, this would suggest 40 of the 200 puzzles have issues.
For reference, puzzle 20 has a typo with number 87 in the wrong place. Puzzle 34 has multiple solutions. Puzzle 50 has a missing piece (the octagon). Puzzle 94 has one of the dots in the wrong place.
The plethora of mistakes makes this really frustrating to attempt the puzzles, as you never know when it's you or the book that has got things wrong.
If you love doing puzzles, avoid this book!
