Books in the Huge Print Diabolical Sudoku series

Check the sample puzzle on the back page to judge the difficulty!Go beyond simple sudoku with this collection of diabolical sudoku puzzles in a travel-sized format of 8x5 inches.1 large print puzzle per page for easy visibility and space for notes.You will need strategies like X-Cycles, BUG, XY-Chain, X-Wing, Simple Coloring, Y-Wing, Swordfish & XYZ Wing amongst others to solve the most difficult puzzles possible.