Will Shortz Presents Ferocious Sudoku: 200 Hard Puzzles in Bloomington, MN

The
New York Times
’ crossword editor and NPR’s puzzlemaster invites you to try your hand and mind at solving some incredible brainteasers in
Will Shortz Presents Ferocious Sudoku: 200 Hard Puzzles
.
Perfectly sized for traveling with big grids for easy solving, discover if you are tough enough to take on the challenge of this collection of 200 devilishly difficult sudoku puzzles!