Leigh Bardugo

"Find a gateway to the underworld. Steal a soul out of hell. A simple plan, except people who make this particular journey rarely come back. But Galaxy 'Alex Stern is determined to break Darlington out of purgatory—even if it costs her a future at Lethe and at Yale. Forbidden from attempting a rescue, Alex and Dawes can’t call on the Ninth House for help, so they assemble a team of dubious allies to save the gentleman of Lethe. Together, they...