kindle-child

An unfinished Kindle book that you have become deeply invested in. Much like a real child, you cannot stay away from it for too long, as you constantly think about it and want to get back.

Bob: "Is Julie headed home already? It's not even midnight!"
Frank: "She has a kindle-child to take care of - she's in the middle of Game of Thrones."
Bob: "Ah. Well, we've all been there."