The Colormazen Summer Sudoku Puzzle Book series is Here! Choose Sudoku puzzles for amusement on long plane or train journeys to your fantasy destination. Ideal for those hot, lazy days in the sun and when relaxing on the beach, the Colormazen Summer Sudoku Puzzle Book series is all that you need. Keep your mind active and prevent boredom. With 200 challenging puzzles guaranteed to keep you thoroughly entertained, this collection is a real treat for anyone who loves Sudoku. Are you ready to rise to the ultimate brain-training challenge? Working the puzzles in this book can provide a vigorous mental workout for virtually everyone from older children to senior citizens. Included in Colormazen Summer Sudoku Puzzle Book Volume 13 :- --50 Easy Sudoku Puzzles --50 Medium Sudoku Puzzles --50 Hard Sudoku Puzzles --50 Very Hard Puzzles -- And so much more! Scroll up and order your copy today....