Aubrey Reynolds

Sydney's rare condition makes her collapse whenever emotions run high-especially in love. When her charming new neighbor Taylor steals her heart, she must fight to stay awake long enough to turn her dream romance into reality.

Stillman, a heartbroken physics student, builds a time machine when his girlfriend breaks up with him. Going back in time, he attempts to save their relationship by fixing every mistake he made—while dragging his best friend along in the process.