ISBN-13: 9781541226531 / Angielski / Miękka / 2016 / 296 str.
- One puzzle per page - Symmetry grids - Appropriate size of puzzles (3.5 inch / 8.89 cm) - Bold and rounded numbers - Added Time Challenger (Start__: __ / Finish: __: __) - Answers inside - 250 puzzles - Professionally designed - Printed on cream paper