Fun Name Sudokus for All Ages Volume 30: Puzzles for Charles - Hard to Insane is an activity book with a variety of exciting personalized name sudoku puzzles with hard to insane difficulty. Children and adults alike will find hours of enjoyment solving these unique and fun puzzles! Puzzle solutions are included! Are you searching for the perfect personalized gift for someone who enjoys puzzles? You found it! This book contains 33 unique puzzles with varying complexity, incorporating the letters in the name "Charles". What better way to surprise your friend, coworker, or loved one? Show them that you care by sending them their own personalized puzzle book today!.