CALCUDOKU: 200 Hard Level Mixed Grid (5X5, 6X6, 7X7, 8X8, 9X9) Puzzles

Name: CALCUDOKU: 200 Hard Level Mixed Grid (5X5, 6X6, 7X7, 8X8, 9X9) Puzzles
Brand: Independently published

Independently published

Pages: 137, Paperback, Independently published