A Better Way to Unplug
Enjoy a relaxing, screen-free activity that sharpens focus and improves problem-solving skills.
Flight Mode Puzzles
Long-Haul Sudoku: A Sudoku Puzzle Book for Adults
Stay sharp wherever you travel.
From long-haul flights to quiet moments at home, Long-Haul Sudoku delivers 250 engaging puzzles designed to challenge your mind and help you unplug. With a clean layout and progressive difficulty, it’s the perfect companion for focused, screen-free thinking—anytime, anywhere.
This collection of 250 Sudoku puzzles offers a satisfying progression from easy to hard, helping you sharpen your mind while enjoying a calm, screen-free experience. With a clean, one-puzzle-per-page layout, you’ll have the space to think, solve, and fully engage—no distractions required.
- 250 Sudoku puzzles for adults (easy to hard).
- Large, easy-to-read grids (one puzzle per page).
- Progressive difficulty to build momentum.
- Perfect for flights, layovers, travel, and daily relaxation.
- Full answer key included.
Take off. Stay sharp. Land satisfied.
About me
Michael P. Busch, Ph.D.
Michael P. Busch, Ph.D., is a Jansky Postdoctoral Fellow at the National Radio Astronomy Observatory in Charlottesville, Virginia. He earned his Ph.D. in astrophysics from Johns Hopkins University, where he studied the structure of the interstellar medium using radio observations. He is known for discovering a previously unknown disk of molecular hydrogen in the outer Galaxy.
Outside of research, Michael enjoys swimming, writing, and solving Sudoku puzzles—especially on long-haul flights.
