Can't remember the books I've read. Most were back in college. I'd have to say, if there was ever one concise and near-indispensible book for theater lighting, it would have to be the Sylvania Lighting Handbook. And that was a handout from the company making most lamps back then! Of course I'm too used to designing in a real space. Poser's AO just doesn't cut it. I need at least Carrara with a proper global illumination solution.