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Guardian Killer Sudoku 2 is a paperback collection of killer sudoku puzzles from The Guardian's puzzle desk, published in 2023. Killer sudoku adds dashed cages with sum targets to the standard grid, so each puzzle mixes arithmetic with placement logic. It suits solvers who have finished ordinary sudoku books and want a harder, more varied challenge. Compared with single-difficulty sudoku collections, it offers a step up in difficulty and a themed set of puzzles rather than hundreds of easy grids.
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Lowest price we've seen: $9.25 on Nov 10 at Walmart. Tracked across 2 stores since Nov 10.