I was looking forward to reading this as soon as i read the blurb, and I was not disappointed! This book has so much depth that i read it within a day. The characters are very well written and make you care about them, and makes you really feel like you know them, which is rare! The book is unputdownable because Sophie Hannah has expertly written it so that you NEED to know the whole story and the subtle twists and turns leave you guessing till the very end, and proving all of your own theories wrong, because you just cant help but create your owm explanations as you go, in line with the maim character! Absolutely brilliant book from start to end and I highly recommend this to all mystery readers!