Hard Killer Sudoku: 250 Sum Sudoku Puzzles for Adults: Sudoku Magazine: 9798581007136: Amazon.com: Books
Killer Sudoku Puzzle Book for Adults: (Sumdoku Sum Doku Sumoku Addoku Samunamupure) Math Logic Puzzle Books | Easy to Hard: Publishing, Puzzle King: 9798675297634: Amazon.com: Books
Sudoku Sums Book 5: Riley, James: 9781596471085: Amazon.com: Books
Large Print Killer Sudoku: 200 Hard Sum Sudoku Puzzles (Logic Puzzles for Adults Series): Alzamili, Dr. Khalid: 9798627884523: Amazon.com: Books
Killer Sudoku Puzzle Book for Adults: (Sumdoku Sum Doku Sumoku Addoku Samunamupure) Math Logic Puzzle Books | Easy to Hard: Publishing, Puzzle King: 9798675297634: Amazon.com: Books
Killer Sudoku Variants: 5 different Variants of Sum Sudoku Puzzles for adults (easy to hard) (Variant-doku): SomatoMint: 9798653108204: Amazon.com: Books
400 classic Killer sudoku 9 x 9 + BONUS 250 Hidoku puzzles: Sudoku with EASY, MEDIUM, HARD, VERY HARD level puzzles and a Hidoku 9 x 9 very hard levels (Killer classic
100 Kakuro Cross Sum Puzzles - Volume 2: Perfect For Those Who Love Both Crosswords and Sudoku Puzzles: Sunny Days Puzzles: 9798653198533: Amazon.com: Books
Killer Sudoku Volume 2: 500 Sum Sudoku Puzzles for adults (Easy to Medium) (Killer Sudoku Adventures): SomatoMint: 9798690557065: Amazon.com: Books
Sum Sudoku: Play Sum Sudoku and Calculate your IQ (Best Brain Games Series) (Volume 1): Bayeh, Claude Ziad: 9781517226053: Amazon.com: Books
Killer Sudoku Variants: 5 different Variants of Sum Sudoku Puzzles for adults (easy to hard) (Variant-doku): SomatoMint: 9798653108204: Amazon.com: Books
Sum sudoku 16 x 16 puzzles: Sanchez Melgar, Salvador: 9781516958924: Amazon.com: Books
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