Luis Royo started drawing comics for different fanzines in 1978. Between 1981 and 1984, his comics were published in Comix International and Rambla magazines. Royo began his career as an illustrator in 1983. His works made it out of Spain and were published worldwide. Royo created covers for American magazines, such as National Lampoon and Heavy Metal, for which he also did erotic and fantasy art.
Three Royo books, 'Women', 'Malefic', and 'Secrets', were published by Norma Editorial, starting in 1992. In 1998 Royo created the art book, 'III Millennium'. In 1999 his 'Dreams' art book was published, and showcases his previous ten years of commissioned illustrations. Another art book, titled 'Prohibited Book', was published later that year. In 2001 'Evolution' was published, which shows a lot of Royo's book cover illustrations with a somewhat mythical, erotic quality.