Dr. Khalid Alzamili
SUGURU Puzzle Book: 200 Hard to Extreme (16x16) Puzzles (Adult Brain Games Series)
Calcudoku Puzzle Book: 200 Medium to Very Hard (7x7) Puzzles (Adult Brain Games Series)
Hitori Puzzle Book: 200 Puzzles (12x12) : Keep Your Brain Young (Hitori for Adults & Seniors Series)
Activity Book : Logic Puzzles for Adults & Seniors: 500 Medium Puzzles (Sudoku - Fillomino - Straights - Futoshiki - Binary - Slitherlink - Sudoku X - ... Minesweeper) (Brain Games for Adults Series)
Suguru Logic Puzzles (Number Blocks): 500 Easy to Hard (10x10) :: Keep Your Brain Young (Logic Puzzles Series)
Activity Book for Smart Kids: 500 Logic Puzzles (Sudoku, Fillomino, Kakuro, Futoshiki, Hitori, Slitherlink, Killer Sudoku, Calcudoku, Sudoku X, ... :: Age 6-10 (Logic Puzzles for Kids Series)
Tons of Masyu for Adults & Seniors: 1000 Easy to Hard Puzzles (9x9) (Logic & Brain Teasers Series)
SUGURU Puzzle Book: 200 Easy to Hard (16x16) Puzzles (Adult Brain Games Series)
Activity Book For Kids : Activities to practice and improve logic skills: 400 Variety Puzzles (Battleships, Futoshiki, Skyscrapers, Fillomino, Killer ... : 6-12 Ages (Logic Puzzles for Kids Series)
Logic Puzzles For Clever Kids: 500 Puzzles & 12 Logic Puzzle Types (Sudoku, Fillomino, Battleships, Futoshiki, Hitori, Slitherlink, Jigsaw Sudoku, ... and Numbrix) (Logic Puzzles for Kids Series)
Activity Book: Logic Puzzles for Adults & Seniors: 100 Easy Logic Puzzles (Samurai Sudoku, Minesweeper, Cross Sudoku, Numbrix, Fillomino, ... and Kuromasu). (Large Print Puzzles Series)