Gustavo Roldán was born Argentina in 1965. His illustrations are widely published, and he has been exhibiting his work since 1985. His books have been published in numerous countries including Mexico, Belgium, Spain, The Netherlands, Brazil, Korea, and Switzerland and have earned him recognition from A.L.I.J.A. (Argentine IBBY), the Prix Octogone (CIELJ, France), and inclusion in the White Ravens catalogue created by the Judendbibliothek in Munich, Germany. His other books with A buen paso publishing house include El señor G (translated into six languages), Historias de Conejo y Elefante, and Juan Hormiga, both also published internationally. He currently lives in Barcelona, where he is a contributor to several publishing houses.

Robert Croll is a writer, translator, musician, and visual artist from Asheville, North Carolina. He first came to translation during his undergraduate studies at Amherst College, where he focused on Julio Cortázar's short fiction. His translations include The Diaries of Emilio Renzi by Ricardo Piglia, published by Restless Books.