The Original Sudoku Page-A-Day® Calendar 2026 from Hachette Book Group is your daily mental workout. Each day presents a new challenge, testing your logic and reasoning skills. This calendar is the perfect companion for Sudoku enthusiasts or those looking to keep their minds sharp. With its compact design, it fits perfectly on your desk, offering a new puzzle every day for an entire year. Start your day with a stimulating Sudoku challenge from HBG, a world-renowned publisher.