Mark grew up on both coasts, first in Westchester County, New York, then in Westlake Village, California. Mark and his wife, Kim, now live in Castle Rock, Colorado, with their three dogs, Rika, Sammi, and Lilly. Mark's been writing for over 6 years, with thirty best-selling novels. Previously, Mark and Kim produced/directed the full-length feature film, Openings, the Search for Harry.