It seems to me that if Peace Talks had been split into 2 books then the publisher would have announced both, since we all know that we'd line up to buy 2 books at the same time.
I'm wondering if someone in the marketing department just got ahead of themselves and this is book 21.
I though Fight Night was pretty firm for book 17, the wrestling one. And the BAT titles are pretty much locked in for Hell's Bells, Stars & Stones and Empty Night.
I doubt it's an outright scam since the Amazon listing is 'ships from and sold by Amazon'. On the other hand, splitting PT into two volumes is the kind of thing I'd be a little surprised to hear from the booksellers announce before Jim or Priscilla did. "It's so long it needs two volumes" would have got a lot of the annoying "when is it out?" questions off his back for a while.
I'm half wondering if it's a surprise graphic novel, listed as a main sequence novel by honest mistake.