Book - Keeping Faith by Jodi Picoult

I've always enjoyed Jodi Picoult's books and this was no different. The plot was quite unique and it kept me reading, wanting to find out what happened. But i was really disappointed with the ending as it was so ambiguous, one that lets you draw your own conclusion. I was so frustrated as it did not answer the question. I felt like i wasted my time reading the book as there was no answer at the end.