"Identity Unknown" by Mary Pat Kleyla is a clean-cut, young adult mystery. The main character, Jamie, has amnesia and is befriended by Carly Colvin and her family. Jamie lives with the Colvin family for eight months while trying to recover her memory. She helps the family with their problems while dealing with her own. Her past turns out to be unusual and fascinating. So many teenage stories today deal with very serious and, sometimes, sad subjects. "Identity Unknown" is different, it is an entertaining family story full of suspense and humor but it has a serious side too. Written to put some cheer into the world, the ending will surprise you.