The Master Theorem

$23.99
A Book of Puzzles, Intrigue and Wit. M's Theorems are not your average Sudoku or crossword puzzles. They're each completely unique, beautifully illustrated, "escape room"!

Buy One Get One Half Off On All Puzzles

Buy one get one half off on all puzzles using code: PUZZLEBOGO. Perfect puzzles for kids of every age with a wide variety of subjects.

Spend $65 and get 2 Puzzles FREE or Spend $100 and get 4 Puzzles FREE!

As one of the only puzzle manufacturers to own patented puzzle dies, their products are always original. Whether it's their 400 piece Family Puzzles, or one of their stunning landscapes, no two puzzles, or pieces, are alike.