The main character who was born on Leap Year. The book takes place in 24 hours on her 16th - technically her 4th - birthday. Each chapter has two portions: the first part in first person from her point of view, and the second part in third person from every other character's point of view.
This teen novel is very cute and very smart. It shows the reader that what you think about someone else may not be well founded and what you assume to be true is not always so. All in all, well worth the read. I recommend it.