Warrior of the Black Mirror: Book one of the Crimson Warrior series: 1

Joel and Erin longed for a time when all they had to worry about was school bullies and birthdays. Instead they are caught in the Intersect a place where worlds connect and the imaginary and reality meet just as it is taken over by an unimaginable force threatening all the worlds connected to it-including our world. Now they must journey through fantastic worlds battling creatures both real and imagined guided by a private investigator from countless black and white movies. If they fail the world as we know it will end...