Hi halaliel
I haven't read any of his stuff. But I do know that many consider him a fruad. He apparently drew alot on theosophical texts to create his stories. That much can be assertained mearly by looking at the titles and chapter titles of some of his books. The little I have heard of the contents of his books holds no resembelance to buddhism which he proports to hold knowledge of. He never travelled to Tibet, never became a Lama. Maybe good works of 'fiction', however he tried to pass them off as more than that.
regards
SnowLion