Author, Writer · 34 titles
Sem Rumo no EspaçoFilm· 1969Writer
CyborgBook· 1972Author
Exo-Man: O Homem de AçoFilm· 1977Writer
Indiana Jones and the White WitchBook· 1994Author
The Final CountdownBook· 1980Author
High CrystalBook· 1974Author
Operation NukeBook· 1973Author
Dark MessiahBook· 1990Author