Packed with over 150 tricky puzzles, The Great Big Book of Really Hard Puzzles is perfect for advanced puzzlers looking for a new challenge.Up for a challenge?This collection contains dozens and dozens of formidable fan-favourite puzzles.Filled with head-scratchers, including:Hidden pictures puzzlesMazesWord puzzlesLogic puzzles-- and more are sure to create hours of fun. This an excellent gift for anyone looking to test their skills!