Luis Carlos Montalvan

Luis Carlos Montalván is the New York Times-bestselling author of Until Tuesday. A writer, advocate, and consultant, he received a master's in journalism from Columbia University. Montalván was a seventeen-year veteran of the U.S. Army who served multiple combat tours in Iraq. For more information, please visit until-tuesday.com

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.