Three Little Words by Ashley Rhodes-Courter. It's a memoir about her life from being taken from her biological mother at a young age, being placed in several foster homes (in one of which the kids were severely abused), and her adoption by two loving parents and two loving big brothers. I gave it to my mother, who is adopted, as a birthday gift and she loved it as well.
Leaving Fishers is a good "teen outcast is drawn into a 'religious group' that she later realizes is a cult she needs to escape" story. I think it's one of Margaret Peterson Haddix's lesser-known works.
The Book of Mordred (or anything else by Vivian Vande Velde, for that matter) is one of my "I love this, but I still don't know why" books because I'm usually not a fan of anything relating to Arthurian legends and Camelot. I also like her kind-of-a-love-story Companions of the Night, which I know someone mentioned on a previous page, and Heir Apparent.
She needs to sort out her priorities! - Ron Weasley