Of Fate and Fire by Amanda Bouchet

The Kingmaker Chronicles meets modern-day New York City

Piers, an exiled warrior from Thalyria, finds himself in the Big Apple just before the holidays. The world and everything in it might be utterly foreign to him, but that won’t stop Piers from helping to complete a vital mission for Athena. His goal? To protect Sophie, a French teacher from Connecticut who’s suddenly knee-deep in inexplicable phenomena, danger, and henchmen after an Olympian treasure that should never have ended up in her hands—or remained on Earth after the Greek gods abandoned it.