Large adult puzzles. Big Hitori and Kakuro sudoku. Hard - extreme levels.: Sudoku for home and tourism. (Sudoku and large size puzzles): Holmes, Basford: 9781080163823: Amazon.com: Books
Big Kakuro and Killer Sudoku easy - medium levels.: Unprecedentedly huge font. (Sudoku and large size puzzles): Holmes, Basford: 9781077074101: Amazon.com: Books
Killer sudoku puzzles and Kakuro.: Hard levels. (Killer sudoku and his friends): Holmes, Basford: 9781075356964: Amazon.com: Books
Adults puzzles book. Big Sukrokuro and Kakuro sudoku.: Medium levels. ( Sudoku and large size puzzles): Holmes, Basford: 9781086422702: Amazon.com: Books
400 classic sudoku 9 x 9 HARD LEVELS + BONUS 250 Labyrinth puzzles: Sudoku with HARD level puzzles and a Labyrinth 21 x 21 very hard levels: Holmes, Basford: 9781727212846: Amazon.com: Books
Amazon.com: 400 classic sudoku 9 x 9 + BONUS 250 Labyrinth puzzles very hard levels: Sudoku with EASY, MEDIUM, HARD, VERY HARD level puzzles and a Labyrinth 21 x 21: 9781727183894: Holmes, Basford: Books
Sudoku rund - Circle Sudoku (German Edition): Rest, Lea: 9783940531490: Amazon.com: Books
400 classic sudoku 9 x 9 MEDIUM LEVELS + BONUS 250 Labyrinth puzzles: Sudoku with MEDIUM level puzzles and a Labyrinth 21 x 21 very hard levels: Holmes, Basford: 9781727207903: Amazon.com: Books