Killer sudoku and Kin-kon-kan easy - medium levels.: Sudoku puzzles book to the road. (Killer sudoku and his friends): Holmes, Basford: 9781074020095: Amazon.com: Books
Puzzlewright Guide to Solving Sudoku: Hundreds of Puzzles Plus Techniques to Help You Crack Them All: Longo, Frank, Gordon, Peter: 9781402799457: Amazon.com: Books
Hard Sudoku Puzzle Book for Adults: 300 Large Print Puzzles: Andrews, Kat: 9781732752092: Amazon.com: Books
100 Hard X-Wing Sudoku: Media, Clarity: 9781728814667: Amazon.com: Books
Sudoku Hard: Sudoku Puzzle Book With 320 Hard Sudoku Puzzles For Adults: Rosenbladt: 9798665413617: Amazon.com: Books
1,000 + Premium sudoku killer 9x9: Logic puzzles medium - hard levels (Killer sudoku): Holmes, Basford: 9781687713988: Amazon.com: Books
100 Hard X-Wing Sudoku: Media, Clarity: 9781728814667: Amazon.com: Books
The Sudoku Method - Volume 1 - Beginner to Advanced (Learn how to solve Sudoku puzzles): Houdini, Sherlock: 9781511452663: Amazon.com: Books
Level Up Your Sudoku Level 3: Wing It Wednesdays: Howell, Tommy: 9781534695443: Amazon.com: Books
Second-Degree Black Belt Sudoku® (Martial Arts Puzzles Series): Longo, Frank: 9781402737176: Amazon.com: Books
Amazon.com: The Second Best Book of Sudoku Strategy: Using inductive reasoning to solve difficult puzzles mentally eBook : Cox, Gino: Kindle Store
400 classic Killer sudoku 9 x 9 EASY + BONUS 250 Hidoku puzzles: Sudoku with EASY levels puzzles and a Hidoku 9 x 9 very hard levels (Killer classic sudoku 9 x 9): Holmes, Basford: 9781727255775: Amazon.com: Books
Amazon.com: Sudoku: Its Power Unleashed -- Kindle Version eBook : Klein, David: Kindle Store
Hard Sudoku Puzzle Book for Adults: 200 Large Print Puzzles: Andrews, Kat, Plus, Puzzle Books: 9781732752047: Amazon.com: Books
400 classic Killer sudoku 9 x 9 MEDIUM - HARD + BONUS 250 Hidoku puzzles: Sudoku with Medium, Hard levels puzzles and a Hidoku 9 x 9 very hard levels (Killer classic sudoku 9 x 9): Holmes, Basford: 9781727300802: Amazon.com: Books
Sudoku Hard 500 Puzzles: Sudoku Puzzle Book - 500 Puzzles and Solutions - Hard Level - Volume 3. Tons of Fun for your Brain!: Puzzles, BeeBoo: 9781691812110: Amazon.com: Books
Sudoku Puzzle Pad: Medium to Hard: 2: Pitkow, Xaq: 0765145120623: Amazon.com: Books
Sinister Sudoku: More Than 1,000 Fiendishly Tough Puzzles: Longo, Frank: 9781435167742: Amazon.com: Books
Sudoku: Its Power Unleashed: Klein, David: 9781974213177: Amazon.com: Books