Oh... this book was amazing. It's not an easy read if you haven't read the books that he's discussing, and even if you have read them in the past, it's a little dry to read about the structural aspects of Bleak House six years after you've read Bleak House (that said, I've never read "The Metamorphosis" but I had no problems getting through that section). But that's just the bits and pieces of this. What this book really boils down to is a discussion of Nabokov's feelings about reading, about how to be a good reader, about what it means to really ingest a book.
My favorite moment in the book is when he talks about how the only way to really read a book is with your back - meaning that if a book doesn't make you feel something between your spine, give you a little tingle, then you aren't really reading anything worthwhile. What a brilliant idea.
And finally, we must remember that, "In reading, we must notice and fondle the details."