Gusti is an illustrator, animation technician, and tireless traveler. He has published more than 150 books in over 20 languages. One of them, Mallko and Dad, won the Bologna Ragazzi Award in the Disability category. I Love My Colorful Nails was his first book published with NubeOcho.

Gusti received the National Illustration Prize in 1990 (Spain); the Lazarillo Prize (Spain); the Golden Pomme of Bratislava in Slovakia; the Junceda Prize (Spain); the Serra D’or Prize (Spain); and the Bologna Ragazzi Award in Italy. He was also nominated for the Hans Christian Andersen Award representing Argentina in 2022.