Christmas 2025 Sudoku – Mild Mischief: The Sudoku Brick Collection – Chrimas 2025 Edition – Large Print Sudoku for Adults: Half-Inch cells, 36-pt ... 1.5–5.5 – Single Solution, No Guessing Ever Paperback – Large Print, December 31, 2025

Large grids with half-inch cells and 36-pt numbers. High-quality, validated Sudoku puzzles.Welcome to the lightest volume in the first release of our brand-new seasonal collection.“Mild Mischief” is the first (Tier 1), easiest of our Christmas 2025 Edition of The Sudoku Brick Collection.Inside are 1250+ carefully graded Sudoku puzzles in the Sudoku Explainer 1.5–5.5 range: starting around “tough newspaper” difficulty, then steadily climbing into puzzles that are rarely collected in print, even in books marketed as “hard.”At the end of the volume, you’ll find all solutions, so that you can quickly verify your results.A New Era of SudokuWe’re building The Sudoku Brick Collection and Sudoku Monthly to become “the” go-to sources for high-quality Sudoku, so we designed these books around the most common pain points we see in the market:Quality: Every puzzle is verified to have one solution, and to be solvable by logic alone, with no guessing required.Difficulty you can trust: Every puzzle is rated by automated solvers to ensure it falls within the volume’s advertised range.Ergonomics: Spacious grids, wide inner and outer margins, and true large print. We’d rather ship a “brick” than cram a great puzzle into a miserable layout.The puzzles are listed in an approximate order of difficulty to avoid too much predictability. We employ the commonly used Sudoku Explainer and HoDoKu rating systems.The Three TiersOur seasonal “Brick” releases come in three tiers, designed to cover everyone from improving beginners to absolute fanatics:Tier 1: Mild Mischief – Starts around challenging everyday puzzles, then pushes into techniques that are just beyond what’s typically available in print.Tier 2: Calculated Chaos – The bridge between “hard” and “serious”: puzzles that demand cleaner logic, better discipline, and a growing toolbox, climbing from strong hard into truly brutal territory.Tier 3: Here Be Dragons – Begins well beyond what most people ever see, and goes off the map from there. (1501 puzzles, and no solutions.)What’s NextAs promised, our Brick Collection is a seasonal one, released every three months: Spring, Summer, Autumn, and Christmas (the last of which is our largest release).As mentioned, we’re also launching Sudoku Monthly: slimmer volumes in five slightly overlapping difficulty brackets to make sure everyone can pick out the one they would best enjoy. These books will come in a travel edition as well which, while smaller, is still designed for comfort. Read more