The Fault in Our Stars

I thought of the novels as very separate from me. I didn't, of course, not imagine that I was going to be inundated with this level of fan mail. There is this real meta experience where sometimes a sick kid will ask me what happens after The Fault in Our Stars. And I'll have to say, like Peter Van Houten, I also don't know. You know, Mark Twain thought his book about Joan of Arc was his greatest achievement. So what do we know?