This superb sudoku collection is perfect for anyone looking for a challenge. Set over five levels of increasing difficulty, you'll see your skills improve as you work your way through the puzzles. With a beautifully designed cove and an elasticated strap, this is the ultimate treat for any sudoku aficionado!

• EXERCISE YOUR BRAIN: Give your mind a great workout as you pit your wits against these number-placement teasers.
• REDUCE STRESS: Feel your stress melt away as you focus on these satisfying puzzles.
• POCKET-SIZED: This handy layout is perfect for carrying on your travels or just to keep by your bedside.

About the Author

Eric Saunders is a prolific writer of non-fiction for children and adults, specialising in puzzle and activity books. He has been compiling puzzles for over 35 years, and his work can be found in books, newspapers and websites around the world.