Exit Black by Joe Pitkin

Imperium is the most expensive structure ever created. Once an orbiting laboratory, it is now a space hotel for the fantastically wealthy. But as the station preps for its first group of space tourists, Dr. Chloe Bonilla, Imperium’s resident biophysicist, finds herself questioning whether babysitting a passel of space glampers is worth the distraction from her research.

A private rocket delivers a rogues’ gallery of the world’s elite to Imperium: eccentric billionaires, callow tech bros, a sponsored Instagram influencer, and a seemingly saintly philanthropist. However, posing among the staff are members of a global terrorist group who call themselves the Reckoners, hell bent on upending the economic inequality of twenty-first-century Earth—and they have a bone to pick with these scions of the 1 percent.

As the Reckoners take control of Imperium and demand an $8 billion ransom from their wealthy hostages, it’s up to Dr. Bonilla to save them, and fast. Or the captives will be forced to exit the station—and there’s only one way out.