The Veil's Edge by Willow Polson
Once you can past the continual dire warnings about not going in over your head, it is a good book for beyond basic. It is detailed in ways others are not and (except for the warnings) does not talk down to you. Many things in there worth looking more deeply into like an energy matrix and veil workings (instructions, woot!) and some I'll never use, for example how to build my own sweatlodge. Thumbs up. I'll probably be thumbs up on almost all of my books because they've almost all come recommended by those I trust.