Joaquín Campstudied graphic design at the University of Buenos Aires and later taught illustration classes. His work has been published in many languages, including Spanish, Italian, Korean, Dutch and English. His illustrations were selected four times for the Illustrators Exhibition at the Bologna Children's and Youth Book Fair. Joaquín's picture book A Sleepless Night, written by Micaela Chirif, was named a 2024 Mildred L. Batchelder Honor Book and a 2025 USBBY Outstanding International Book. His illustrations have been exhibited in Argentina, Mexico, Spain, Peru and Japan and beyond. His book Aldo: Ghost Dogwas reviewed positively in the Wall Street Journal and also received a starred review in Kirkus. Joaquín currently resides and works in Madrid.

Lawrence Schimelwrites in both Spanish and English and has published over 130 books as author or anthologist in a wide range of genres, including fiction, poetry, graphic novels and children's literature. His children's books include Early One Morning, Bedtime, Not Playtime!and Lucky Me, which was chosen for IBBY'S Outstanding Books for Young People with Disabilities and also won a Crystal Kite Award from the Society of Children's Book Writers and Illustrators. Lawrence is also a prolific literary translator of over 200 books, including Newborns: How Baby Animals Come into the World, RO-BOand Cristina Plays, which received a starred review from Publishers Weekly. His translations have won a Mildred L. Batchelder Honor and an Américas Award Honor (twice), among other distinctions. He lives in Madrid.