This book investigates the advanced logical methodologies required to transition from solving intermediate Sudoku puzzles to mastering those classified as fiendish. Wayne Gould, a recognized authority in the field of Sudoku, utilizes his expertise to dissect the complex patterns and deductive reasoning necessary for high-level play. The text provides a structured framework that moves beyond basic grid-filling, offering specific techniques designed to break through the plateau often encountered by experienced puzzlers.

The book is regarded as a practical, skill-focused resource for enthusiasts seeking to refine their analytical approach to grid-based logic puzzles. Its systematic presentation of advanced techniques makes it a functional tool for readers aiming to increase their proficiency and speed in solving complex Sudoku grids.