Sudoku IQ: Puzzle IQ Series
This isn't just another Sudoku puzzle book — it's a Sudoku Mastery System. Our carefully crafted difficulty progression takes you from easy warm-ups to advanced, brain-teasing grids across 10 structured levels (15 puzzles each).
Track your progress using the built-in Sudoku IQ scoring system — a casual but motivating way to measure your comfort level as you advance. Complete solutions are included at the end of each level, and a bonus extreme-difficulty puzzle is included for the truly dedicated solver.