| Title | Publisher | Year | Language | Documents |
|---|---|---|---|---|
| Alerta Ovni | Ricardo Villalba Martinez | 1989 | Spanish | |
| Aventura en el Siglo XXIV | Ricardo Villalba Martinez | 1997 | Spanish | |
| Elegido, El | Ricardo Villalba Martinez | 2002 | Spanish | |
| Star Wash | Ricardo Villalba Martinez | 1991 | Spanish |