Extremely Hard Sudoku for Seniors: 200 Insane Sudoku Puzzles to Keep Your Brain Running, Improve Focus and Memory, and Reduce the Risk of Alzheimer's Disease

Extremely Hard Sudoku for Seniors: 200 Insane Sudoku Puzzles to Keep Your Brain Running, Improve Focus and Memory, and Reduce the Risk of Alzheimer's Disease

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  • Binding: Paperback (254 pages)
  • Publisher: Independently Published (January 12, 2020)
  • Author: Senior Press
  • ISBN-10: 165972029X
  • ISBN-13: 9781659720297