I have one book from him, 'waking up'. He bases himself a lot on Gurdjieff's ideas that we are not fully conscious, that we are in some sort of waking-sleep state, and he uses several analogies (some by gurdjieff, some from him) to show this, as well as explaining different terms and also giving some practical directions how to try to be more awake..
Its a good book, but not amazing. I havent checked more from him..