Contemporary Christian Fiction discussion

I just finished Thieves by Robert Crawson but when I got to the final chapter or what the author calls the "multi-verse," I got thoroughly confused over the final situation concerning Foster and Javan. Well-written with fleshed-out real life characters with the paranormal sci-fi twist thrown in right at the end. If someone else who has read this could possibly explain what had happened I would appreciate it because I'm CLUELESS.