200 Sudoku Puzzles (with solutions) - Book 2

200 Sudoku Puzzles (with solutions) - Book 3

200 Sudoku Puzzles (with solutions) - Book 5

200 Sudoku Puzzles (with solutions) - Book 1

100 Rectangular Mazes (with solutions) - Book 3

100 Rectangular Mazes (with solutions) - Book 6

Circular Maze - Book 3

Circular Maze - Book 5

Circular (triangular lattice) Maze - Book 1

Circular (triangular lattice) maze - Book 2

Rectangular Maze - Book 7

Circular (triangular - lattice ) maze - Book 3

Rectangular Maze - Book 10

Rectangular Maze - Book 5

Rectangular Maze - Book 12

Circular (triangular - lattice) maze - Book 4

Rectangular Maze - Book 8

Circular (triangular - lattice) maze - Book 5

100 Rectangular Mazes (with solutions) - Book 7

Circular Maze - Book 4