A Stolen Life by Jaycee Daugard... what a story! Jaycee was abducted at age 11, and at age 29 was discovered having been kept prisoner at a guy's house for 18 years. During that time she gave birth to two children.
The poor girl suffered harrowing assaults from her abductor. She must be pretty smart, because she was able to quickly figure out ways to survive and how to avoid the worst of the worst happening to her.
Her account of reunification with her family and friends, and how she goes about healing after such trauma, is also quite fascinating. She didn't realize the depth of "learning" she experienced while a prisoner and the un-learning she had to do until she went through it. The human mind/spirit is an amazing thing.