Killer Sudoku for Experts, Book 1: 200 Mind-bending Puzzles - Paperback
by Ella MacMillan (Contribution by), Robert MacMillan (Author)
Are these the most difficult Killer Sudoku puzzles in the known universe? A compendium of 200 puzzles, strictly for experts. 40 3-star puzzles to warm you up. 80 4-star puzzles to click into top gear. Then 80 5-star puzzles when you're in Killer Sudoku overdrive. Finish them all and justify your place among Killer Sudoku grandmasters.
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