This is a wonderful book, which operates on several levels.
If you take it simply as a story, then you'll find it a jolly good read. Maziar's life, his family history, his adventures in prison, his family's courage, and his ultimate deliverance - all this makes a riveting, satisfying and very moving story.
Secondly, if you are interested in international relations and the recent history of Iran, then the book also provides a fascinating and unique insight.
And finally, the book provides a glimpse of how delusional people can become if they are brainwashed and deprive themselves of contact with the outside world. Through the questions he asks, Maziar's prison interrogator reveals his beliefs and understanding of the west. The picture of the west this man carries around with him is truly astonishing, and this especially applies to his understanding of relations between the sexes.
Worth reading for any one of these aspects alone. But put them together and you have a winner. Thoroughly recommended.