The Silent Sister by Diane Chamberlain

Riley is just a baby when her older sister commits suicide. Riley and her brother grow up in a family devastated by this loss. But now, years later, while sorting through her father's affairs after he passes away, Riley learns that Lisa is still alive. But why does everyone think she committed suicide? And what secrets are still out there? Riley will soon find her life upside down when long kept secrets are revealed.

I loved this book. It is told through Riley's viewpoint as well as Lisa's. It does flash back between present and past, but the story is woven together very well to where you don't get confused. I found myself wanting to keep reading and reading to find out what was going to happen next. I did figure out one of the twists, but still, over all it was an excellent read.