Killer Sudoku puzzle book for adults: 400 Puzzles 9x9 Very Hard

The book contains 400 Killer Sudoku puzzles 9x9 at the level of Very Hard.Details about this Sudoku book: * Two puzzles per page.* Each puzzle has only one solution.* Answers to every puzzle are provided.* Easy to open and solve Sudoku thanks to wide fields* Bigger print than in most newspapers and magazines.* High quality paper (easy to write with pen and pencil without worry of bleed-through) .Enjoy the most popular puzzle game in the world! Order the best Killer Sudoku book now!