Twist of Time by Tricia Goyer

They thought they were fighting a war. They didn’t know it was the end of time.

In 1945, war rages across Europe, but deep beneath Prague, another kind of battle is unfolding. It’s a fight not just for land or power but for the very soul of humanity.

Kateřina Dubová, a brave journalist turned spy, receives a mysterious gift from a high-ranking Nazi officer―a jewel tied to a terrifying prophecy. Clues draw her deep into ancient secrets hidden within Prague Castle and a clock that may hold the power to save the world . . . or bring about its destruction.

Kateřina joins forces with Josef Loew, a gifted inventor; Theodora, a daring mafia spy gone rogue; and Dante, a historian with a powerful artifact of his own. Together, they unravel a chilling plot rooted in mysteries that whisper from beyond the veil.

But the deeper they go, the more dangerous their path becomes. Otherworldly forces are seeping in, and time is running out. Can this unlikely group stop the countdown before darkness falls for good?