Gusti (the pseudonym for Gustavo Rosemffet) is a musician, ornithologist, illustrator and author. He is one of the most important illustrators in the Spanish speaking world and has won several awards. His book about his life with his son, who has Down Syndrome—Mallko y Papá—won the Bologna Ragazzi Prize for the best book on a child with a disability. His works have been translated into Japanese, English, French, German, Greek Korean, Portuguese, Hebrew and Catalan. He was born in Argentina and lives in Barcelona, Spain, with his wife, Anne Decis, and two sons.