Ten volumes. Hundreds of Killer Sudoku puzzles. An ever-rising difficulty curve that has pushed solvers from comfortable to challenged to genuinely tested. Volume 10 is the final installment of the Revenge series - and it does not go gently.
If you have followed this series from Volume 1, you know how it works: cage sums replace starting digits, and every cell must be deduced through sum analysis, the Rule of 45, innies, outies, and increasingly sophisticated techniques. By Volume 10, the puzzles assume mastery of everything the previous nine books have taught.
The Revenge series has been the backbone of DJAPE's Killer Sudoku catalog - the progression path that takes solvers from intermediate through advanced. After Volume 10, the next step is the Deadliest Killer Sudoku series (5 volumes) and then the World's Hardest Killer Sudoku series (3 volumes).
Compact 6 x 9 inch format. All solutions at the back. Every puzzle solvable through logic alone.
From DJAPE - who started this series and has watched it grow into the most comprehensive Killer Sudoku progression available anywhere. Over 250 books, PhD in Computer Science, Washington Post since 2006.