In This Moment by Gabrielle Meyer

Maggie inherited a gift from her time-crossing parents that allows her to live three separate lives in 1861, 1941, and 2001. Each night, she goes to sleep in one time period and wakes up in another. Until she turns twenty-one, when she will have to forfeit two of those lives–and everyone she knows in them–forever.

In 1861, Maggie is the daughter of a senator at the outbreak of the Civil War, navigating a capital full of Southern spies and wounded soldiers. In 1941, she is a navy nurse, grappling with her knowledge of the future when she joins a hospital ship going to Pearl Harbor. And in 2001, she’s a brilliant young medical student, fulfilling her dream of becoming a surgeon.
While Maggie has sworn off romance until she makes her final choice, an intriguing man tugs at her heart in each era, only complicating the impossible decision she must make, which looms ever closer. With so much on the line, how can Maggie choose just one life to keep and the rest to lose?