- 1,000+ Wordoku Puzzle Book for Adults: Word-based Sudoku Puzzles with a secret 9-letter word.
- Wordoku On The Go Companion Vol.1: 180 Medium Word-based Sudoku Puzzles with a secret 9-letter word
- Wordoku On The Go Companion Vol.3: 180 Medium Word-based Sudoku Puzzles with a Secret 9-letter word
- Wordoku On The Go Companion Vol.4: 180 Medium Word-based Sudoku Puzzles with a Secret 9-letter word
- Wordoku 600 Puzzles for Adult: Medium Puzzles with Solution










