| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 2010 | 978-0-9830056-0-5 | Luis B Yanez | Not so Easy Spanish Crosswords |
| 2011 | 978-0-9830056-1-2 | '' | Crossword Spanish Verb Conjugation: Practice English to Spanish verb conjugation using crosswords |
| '' | 978-0-9830056-2-9 | Luis Baudel Yanez | Spanish Verbs: Spanish Verb Conjugation |