I really enjoyed Slave, Mende Nazer's harrowing story of modern day captivity. The sequel - Freedom - is free on Kindle this weekend.
Just downloaded it and going to read right away.
www.amazon.co.uk/Freedom-The-Sequel-Slave-ebook/dp/B007Q2IQ2Y/ref=sr_1_1?s=digital-text&ie=UTF8&qid=1336818395&sr=1-1