Harper Paris loves to travel. Her favorite cities in the world are Paris (like her name!) and New York City. She has collected many souvenirs on her travels, including a good-luck coin from Japan and a reindeer-horn pendant from Sweden. She also loves mysteries. When she was a kid, she read Hardy Boys and Nancy Drew books after bedtime with a flashlight. She now lives with her family (including two cats and a bunny, who are not good travelers) in Ithaca, New York.

Marcos Calo has worked as a professional artist for more than fourteen years. He has worked in different fields including illustration, animation, and comic books. He lives with his wife and daughter in A Coruña, a small Spanish town by the seaside.