When fourteen-year-old Victorian waif Riley shows up in the 21st century on seventeen-year-old FBI Agent Chevie Savano’s watch, the two of them pair up and head back to the late 19th century to escape Riley’s evil pursuer.

Although the book involves wormholes and scientists, it’s really a quantum fantasy, wherein an ordinary fantasy has the word “quantum” scattered throughout in key places, typically before the word magic, magician, or wormhole. Nevertheless, we’ve listed it as science fiction to match its publicity material.