Ow Nabokov, if only you used your writing powers for good. I have read about 5 different books whilst reading this one, just because I was too much at times. Especially after part I.

Spoiler

All hope is lost after part I, because even though you know this is not going to end well, it is shattering to know he has had his way.

The realism of the book, the way you see the world through a 'villains' mind, it is admirably done. Still, I would not recommend it for the weak of hearts, because it will break you.