World’s Hardest Killer Sudoku: Is Your IQ Good Enough to Solve These INSANE Puzzles? (World’s Hardest Killer Sudoku Books)

I’ve listened to your requests. Finally, a book full of IQ Killer Sudoku puzzles and a few INSANE. Nothing easier than that!
One puzzle per page.

No other explanation needed. You wanted fiendish killer sudoku puzzles, I delivered. The ball is in your court. Or, rather, the book. And the pencil. Play!