Compact, focused, and easy to carry, this edition brings Braineo’s hard Sudoku format into a smaller, travel-friendly size. It includes 100 hard Sudoku puzzles for experienced solvers who want quick access to a stronger challenge in a practical downloadable format.

Designed for everyday use, this book is ideal for short puzzle sessions, travel, or keeping a compact challenge close at hand. It delivers the same puzzle-first clarity in a format that feels efficient and portable.

• 100 hard Sudoku puzzles

• Compact travel-sized layout

• Full solutions included

• Clear grids for focused solving

• Built for experienced solvers