After studying the film in class, I thought I knew it too well to take full pleasure in the book again.
That was forgetting, of course, Rowling's lively writing and the many details necessarily cut out of the film.
I won't go over the benefits of either the book nor the novel any more.
Suffice to say I devoured it in two days, despite knowing it nearly by heart.
I will state, however, that I greatly admire how effortlessly consensual Rowling is with her characters. Without attracting the least bit of attention to it, she is persistently non-sexist and non-racist in a very natural way that should be run-of-the-mill. Love it!