Don’t you just hate it when you get tossed out of your doomsday cult only to have doomsday happen a few days later? We’ve all been there. And by “we,” I mean Wynter Roth, the main character of writer Tosca Lee’s medical thriller The Line Between. Sadly, Wynter’s life isn’t getting any better in the sequel, the dystopian, post-apocalyptic sci-fi novel A Single Light (paperback, Kindle, audiobook) that’s also the final book of this duology. In the following email interview, Lee discusses what inspired and influenced this second (not entirely implausible) installment.