Puzzlers will be challenged to the limit with this extremely hard Sudoku workbook of brain strengthening puzzles. This is Volume 50 of the extremely hard Sudoku series. It features 300 fun and original Sudoku puzzles for hours of entertainment. Each volume is completely independent from the others. In other words, you can start with any number in this series. Each and every Volume has 300 different & unique Sudoku puzzles, but similarly styled in a 9 by 9 game. Every puzzle also has a solution key. Try not to peek, but if you get stuck, it's there to help. If you need something a little easier, check out my profile for Sudoku books with various difficulty levels. Keep your mind stimulated and put aside time to play Sudoku every day!
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