The Most Holy Trinosophia, by the Comte de Saint-Germain (Forgotten Books)
About the Author:"The Count of St. Germain (fl. 1710 - 1784) has been variously described as a courtier, adventurer, charlatan, inventor, alchemist, pianist, violinist and amateur composer, but is best known as a recurring figure in the stories of several strands of occultism - particularly those connected to Theosophy, where he is referred to as the "Master Rakoczi" or the "Master R". Some sources write that his name is not familial, but was invented by him as a French version of the Latin Sanctus Germanus, meaning "Holy Brother"."(Quote from wikipedia.org)