Keep your sudoku sharp. Solving these impossible sudoku puzzles requires much brain power

You asked for difficult so here it is - you got it!!

We put the settings of our sudoku generator machine to the highest level and maxed out our hardware - this is the result.

Solve the puzzles and win bragging rights for a place in the top 10% of sudoku solvers!

This is a book for diehard sudoku fanatics. If you're not a sudoku fanatic, it's going to leave you flabbergasted at how complex the sudoku is.

• Puzzle solutions are on every page
• 297 challenging Sudoku puzzles
• Two difficulty levels (hard, and nightmare)
• This is a truly awesome and unique book!

These Sudoku puzzles are challenging and will leave you with a lot of time to think and relax while you solve the puzzles.