Satanic masters,powerful magicians

Hi,i been wonder,since i start in the occult,i star buying books from u.k.the authors seems solid,well versed in magik,buf a few realky got tha fame,reputacion, can remember,or mention of any living masters,? Herw in the states are some,not names sorry,but a few have take the occult to the oter side of the atlantil.,its a company who sells booklets,the authors some are alive,is far i knw ,only 3 british ocults guys,dead& alive,are well famous here,in usa,tanks,

What is the company called?