I'm not the author Ted Dekker, or an affiliate for him. I can say however, I do know that most of his books are intertwined and you will definitely find clues/similar characters in all of his related books. Several of his series interconnect and I think it is a way to draw us in, but I also think this is simply his style of writing. You can learn more at his personal website and he has a contact link (https://www.teddekker.com/contact) that you could e-mail. There is no guarantee he will respond, but it doesn't hurt to ask if you're curious for a more personal response from Ted Dekker.