Denise Dowling Mortensen is the award-winning author of Good Night Engines, Wake Up Engines, a combination flip book of both Good Night Engines/Wake Up Engines, Ohio Thunder, Bug Patrol, and the forthcoming Buenas Noches Motores/Good Night Engines, all published by Clarion Books/HMHCo. When she is not writing, she works as a special education assistant and teaches writing and knitting to elementary students after school. She also mentors aspiring children's authors and is a council member for the Rutgers University Council on Children's Literature. She is the mother of five children and lives in New Jersey.