Amazon has "Founders: A Novel of the Coming Collapse", released on July 30, and "Expatriates: A Novel of the Coming Global Collapse", to be released on October 1. I got the free Kindle sample of "Founders...". It has an "Author's introductory note" saying that though this is a sequel to two earlier books, it can be read independently, losing only some backstory of some of the characters. The opening chapter is entitled "Hammer Time".