Puzzles by M. J. Bailey
Extreme puzzle books.
For people who finish the “hard” section and want something properly hard. No warm-ups, no filler: every logic puzzle sits at expert level or beyond.
150puzzles in every book, one per page
4hardest levels only, in rising order
1solution per puzzle, reachable by logic alone
QRon every logic solution: a step-by-step walkthrough
The launch titles
5 × 8 inch paperbacks, £8.99 / $9.99. Small enough for a bag, big enough to write in.
Stuck? Scan the solution.
Every sudoku and killer sudoku solution in our books carries a QR code. Scan it and you get an animated walkthrough of that exact puzzle, one move at a time: which cell, which digit, and the technique that proves it.
Use it to check your work, to learn the move you were missing, or to see the one step that unlocks the rest. Each walkthrough has its own private link that only the book can give you.
- Step 12 Hidden single: 7 can only go in one cell of box 5.
- Step 13 Naked pair {2,9} in column 4 removes 2 and 9 from the rest of the column.
- Step 14 XY-Wing: whichever way the pivot goes, 5 is ruled out of r8c6.
A long series
Each puzzle type gets its own colour. More titles follow every month.
- Extreme Sudoku
- Extreme Killer Sudoku
- Extreme Wordsearch
- Kriss-Kross
- Codewords
- Kakuro
- Calcudoku
- Futoshiki
- Hitori
- Nonogram
- Samurai Sudoku
- Sudoku X
- Suguru
- Thermo Sudoku