Alena Gurin
Sudoku Collection
1000+ Sudoku Jigsaw Killer Puzzles Hard- 1000+ Sudoku Jigsaw Killer Puzzles Medium to Hard
- 1000+ Sudoku Killer Puzzles Medium
- 200 Extreme Sudoku
- 500 Sudoku Puzzles Hard
- 500 Sudoku XV Puzzles Medium
- Battleship Puzzle Book for Adults
- Binary Puzzle Books for Adults
- Calcudoku Puzzles Mixed Grids Book for Adults
- Easy Calcudoku Puzzles 9x9 Book for Adults
- Fan Activity Book for Adults and Kids Word Search Puzzle