Oona Out of Order

It's New Year's Eve, and Oona is about to turn nineteen, but something goes awry, and Oona finds herself to be suddenly forty-one and far into the future. She soon learns that this happens to her every year on her birthday. She is living her life out of order.

I was afraid this book was going to be just another gimmick, but instead I was delighted to find that it was both a bit of a mystery, almost like putting together a jigsaw puzzle, as well as a gentle commentary on life.