This Heart of Mine by C.C. Hunter, Out Feb. 27
Seventeen-year-old Leah MacKenzie is walking around with her heart in a backpack. Well, an artificial heart, and it's the only thing keeping her alive until she gets a transplant. When a heart becomes available, Leah learns that it's the heart of a fellow student, and the rumor is that he's committed suicide. After the transplant, she begins having disturbing dreams, and she realizes that she needs to learn more about the boy who gave her his heart. This Heart of Mine is a moving young-adult novel about life, death, and grief.