re-Fifth Head of Cerberus: I read the book some considerable time back. The book is divided into 3 parts, with the perspective from which the three parts are written being different.
Personally, I found the 1st part to be very, very good and struggled through parts 2 and 3 for the sake of completeness, but found them somewhat uninteresting in comparison. ( I would add that this being a personal opinion should not be taken as a valid judgment of the book etc etc...)
I would recommend that you read the book.
Pervaze Akhtar