Book Travelling

How do you distinguish the good books from the great? For me, it is something I like to call 'Book Travelling'. It is where I as an individual person cease to exist in this world, and become part of the book. I am in the book, travelling its pages, living there. I belong in the book. Stopping reading is like slowly rising through the stratosphere until I am once again me. In my chair, with a book on my lap.
Sure, some books are good for a light read, some are pleasant and enjoyable on an upper level, but you're left on the outside looking in. You skim the surface of the novel, without gaining entry. The truly great novels are the ones you can dive down into, breathe, live, become.