A Sword in Time — Cidney Swanson

DaVinci has a job to do: travel back in time to save her house from demolition, which isn't a problem except that in doing so, she ruins everything else in her life. Quintus, a hunk from 53 BC stuck in this century, has his own job: deliver a letter from Caesar to Pompey. Obviously, he'll need a time machine, too. But when he and DaVinci accidentally travel together to ancient Rome, they'll both need swords, daggers, benches, and -- oh, yeah -- a not-broken time machine to get out of there alive.A Thief in Time and its sequels are clean and wholesome young adult romances packed with historical detail and perfect to read with your daughter or grandmother.