Under the Light (Light #2) by Laura Whitcomb
Helen needed a body to be with her beloved and Jenny needed to escape from hers before her spirit was broken. It was wicked, borrowing it, but love drives even the gentlest soul to desperate acts.
When Jenny returns to her body, she finds that someone has been living her life while she was away. She doesn’t remember being Billy’s lover or defying her family. But now she is faced with the consequences. And Helen, who has returned to warn Jenny—to help her—finds herself trapped, haunting the girl she wished to save.
In this captivating companion novel to A Certain Slant of Light, the love story between Jenny and Billy begins out-of-body—where they can fly and move the stars–and continues into the tumultuous realm of the living, where they are torn away from each other even as they slowly remember their spirits falling in love.