I'm currently reading Mastering Witchcraft by Paul Hudson. It's far from Wicca, although it has an Alexandrian flare. He's worth the read although I don't agree with everything he says, but I rarely agree with modern magick books. My library is filled with folk lore and mythology books as well as reference books primarily.
But one I really want to read is Jake Stratton Kent's books, especially Geosophia. They're just so much more expensive than I normally like paying for a book. But when I have money to burn like you, I'm totally going for it! He goes into the pagan roots of the grimoires.