I am familiar with Oberon's works. They seemed like they were geared more towards children. Not that the information is bad, by any means. Most of it is quite good, and he has done a lot of research into magical practices. I looked at his online school, read his books, and listened to what he had to say. I think there is a bit of a showman and storyteller in him (not in a bad way). All in all, what he gives is not bad, but just not seirous and focused enough for my taste.