Unlocking Sudoku - Core Principles & Foundational Techniques - Volume One
This 286-page book is where you build the foundation. We’ll guide you through grid architecture, candidate notation, and the core techniques that solve the majority of puzzles: Naked & Hidden Singles, Locked Candidates, Naked Pairs, Triples, and Quads.
Digital Download Version
Each volume is also available as a PDF. To purchase the PDF version for download to your device, go to each book's "Explore" page.
Unlocking Sudoku - Schools of Fish & Geometric Patterns - Volume Two
This book, containing 280 pages, teaches you to see the grid in a new way by mastering X-Wings, Swordfish, Jellyfish, Skyscrapers, Two-String Kites, Y-Wings, and more.
Unlocking Sudoku - Advanced Chains & Grandmaster Theory - Volume Three
This book, containing 330 pages, teaches you to follow the logic of cause and effect with Simple Coloring, XY-Chains, Almost Locked Sets, AICs, and other grandmaster tools.
Unlocking Sudoku - Uniqueness, Expert Theory, and Last Resorts - Volume Four
This book, containing 212 pages, teaches you to master the unwritten rules of uniqueness, which are advanced solving strategies that rely on unique solutions (Deadly Patterns, BUG+1), and the ultimate expert strategies like Forcing Chains and Bowman’s Bingo.