How To Play Sudoku

Sandwich Sudoku: 100 Easy-Medium-Hard Sudoku puzzles with solutions and How-to-Play instructions..

Frame Sudoku: 100 Easy-Medium-Hard Sudoku puzzles with solutions and How-to-Play instructions.

Classic Sudoku: 100 Easy-Medium-Hard Sudoku puzzles with solutions and How-to-Play instructions

Letter Sudoku: 100 Easy-Medium-Hard Sudoku puzzles with solutions and How-to-Play instructions.