Luis Carlos Montalván is the New York Times-bestselling author of Until Tuesday. A writer, advocate, and consultant residing in New York City, he received a master's in journalism from Columbia University where he is presently completing a master's in strategic communications. Montalván is a seventeen-year veteran of the U.S. Army who served multiple combat tours in Iraq.
Bret Witter has collaborated on many acclaimed books, including the New York Times bestseller Dewey. He lives in Louisville, Kentucky.
Dan Dion is a photographer residing in San Francisco, California.