This is book number 1 in the Outlander series.
If you've ever felt like you were born in the wrong century; had a thing for red heads; or had a penchant for men in kilts than this is the book for you! — Northshire Staff
A former British combat nurse accidentally walks through the standing stones at Craigh na Dun in 1945, and travels back in time to 1743 in the Scottish Highlands. Disoriented and lost, Claire must place her trust in Jamie Fraser, a young Scots warrior. Torn between two timelines, Claire must make a choice - a choice that will ultimately affect her own future, and the futures of many in the course of two histories that intertwine.
Historically accurate, and beautifully written, Diana Gabaldon's Outlander book series is among one of my favorites. Themes of romance, history, family ties and loyalties, betrayal, and the brutal realities of war sums up the series with a touch of humor and charm as well. If you're a fan of historical fiction, definitely give Gabaldon's series a try.