AX: Can THE EXPANSE continue as a TV series if you run out of book?
SHANKAR: Well, that’s not going to be easy to do, because [five novels and four novellas have so far] been published. They’re planning on writing nine [novels total].
AX: So you’re in GAME OF THRONES territory, where if you do manage to get through this one big novel, here’s the next big novel in the series?
SHANKAR: Absolutely. They have a big story to tell, it takes a lot of time to actually go through it. We are not rushing through these books by any stretch of the imagination. The nice thing about television is, you get to spend time and live with people and learn these characters. The books move at a crazy fast pace in terms of plot and event. We actually had to slow it down a little bit, just so you could spend time with the characters and get to know the people on the show.
Source and more: Assignment X