Another Little Piece starts with a mystery. Annaliese Rose Gordon disappeared about a year ago and is found wandering in Oklahoma. However, the girl who is Annaliese, knows that she is not Annaliese. She doesn't know who she is.
I found this book similar to This is Not a Test in that it is confusing and information is told in a non-linear fashion with the regular storyline going forward, and the girl who is not Annaliese remembering the past and who she is and who she has been in the past.
It was an interesting book, but not one that I would go for again.