Will Shortz Presents Darling Sudoku: 200 Harder Puzzles

This second book in the series is for savvy sudoku solvers who are looking for puzzles that are harder than hard.

Features:
- 200 fearsome puzzles - Edited by legendary New York Times crossword editor Will Shortz - Portable and affordable package

Also in the series:
-Will Shortz Presents Difficult Sudoku
-Will Shortz Presents Dangerous Sudoku