Letter 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

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.

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