It took me two tries to read it. The writing is very "dense" which is the best word I can find to describe it. Humbert rambles on and on about everything except what is actually happening in the story.
Granted, there are laugh-out-loud moments (Mr. Potts, bring the cots!), and others I can't really recall. Readers as erudite as Humbert himself should catch all the literary jokes (I didn't).
Humbert does some really nasty stuff to Lolita. Sleeping with a twelve-year-old was only one of the terrible things done to her. Kidnapping her out of camp and then not telling her about her mother's death. Marrying her mother simply to get close to her. Chasing Quilty across the country with Lo along.
I suppose the book is about obsession.
I am glad I read the book all the way through at least once. I saw the James Mason/Kubrick version tonight. Guess I have to see the later one now.
Well good luck with this book, hope it takes you only one try.