Sudoku puzzles are extremely satisfying to solve, as well as improving your memory and logical thinking. The puzzles in this collection are graded by difficulty, so whether you are a beginner who wants a gentle introduction or an experienced puzzles solver looking for an expert level challenge, this collection has the puzzle for you. Large-print type is used throughout the book, making the puzzles easy on the eye and extremely enjoyable to complete. • Large-print type with plenty of space around the puzzles means that you won't strain your eyes as you solve them. Each puzzle is graded, from beginner to expert, so you can enjoy the satisfaction of seeing your skill improve as you work through the levels. Give your mind a great workout as you find where each missing number fits. Feel your stress melt away as you focus on these satisfying puzzles.