Series:

Famous Frog Extra Hard

6 primary works

Book 1

Cover of Famous Frog Sudoku 300 Extra Hard Puzzles With Solutions

Book 2

Cover of Famous Frog Sudoku 400 Extra Hard Puzzles With Solutions

Book 5

Cover of Famous Frog Sudoku 800 Extra Hard Puzzles With Solutions

Book 6

Cover of Famous Frog Sudoku 1,000 Extra Hard Puzzles With Solutions

Book 7

Cover of Famous Frog Sudoku 1,200 Extra Hard Puzzles With Solutions

Book 8

Cover of Famous Frog Sudoku 1,500 Extra Hard Puzzles With Solutions