The books ended with Ethan waking up a couple of thousand years later, after having gone into hibernation to outlast the abbies, so there would be potential there for another book, even though Crouch says he isn't writing one. I just don't see where there was much, if any potential in the way season one of the series ended. They explained Maggie in the books. The series, not so much. Assuming they're following the books, there is a story to tell there and when I talked to Crouch and Shyamalan at Wondercon, they said they were going to explore the motivations of the abbies this season, so that part is fine, but honestly, the human characters all suck and I don't really care that much about the abbies as they are set up here.