For the most varied range of sudoku puzzles with the widest range of difficulty available anywhere, look no further than the "Observer"'s "Killer Sudoku". Combining elements of sudoku and kakuro, these headscratchers will test the skills of even the most practised sudoku fan. This collection contains 150 previously unpublished puzzles of varying levels of difficulty, so whether you're new to the Killer Sudoku grid or are a seasoned solver looking for a challenge, this book will keep you occupied. Be warned, though - some of these puzzles are so fiendishly difficult they may well keep you up all night.
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This is a used book - there is no escaping the fact it has been read by someone else and it will show signs of wear and previous use. Overall we expect it to be in very good condition, but if you are not entirely satisfied please get in touch with us.