The Time Traveler's Wife by Audrey Niffenegger. The story of Henry, a time-traveler who has no control over when and where he disappears through time, and Clare, his wife. The time travel aspect adds an interesting twist to a really sweet love story.
The Kite Runner - Khaled Hosseini. Story of a boy Amir, from Afghanistan who needs to find his way in the world as he realizes that his own belief system is not that of his dominant culture. Set in Afghanistan and the United States.
Redeeming Love, by Francine Rivers is a historical romance novel set in the Gold Rush in California. The story is inspired by the book of Hosea from the Bible. Its central theme is to portray the redeeming love of God towards sinners.