I love many books but Jane Eyre by Charlotte Bronte tops my list. I remember sitting on my mum's lap watching a television adaptation when I was about four - and it frightened me so much it took me until I was 19 to pluck up the courage to read Jane Eyre. It was then I discovered the scary bit wasn't so scary after all. (We should never anticipate what's going on in a child's mind because we never know. The self-assured clever clogs of the adult world only think they do).
Jane Eyre is a book I can pick up and open on any page at any time - and just read - and, in my opinion, it contains the most passionately heartfelt speech in all of English literature. An absolute masterpiece that stands the test of time.