Also called The Secrets of Secrets, this black magic grimoire purportedly was written in the 1600s by a magician named Toscraec, who claimed that it was based on a centuries-old manuscript written in an unknown language. Toscraec said he was only able to translate the manuscript with the help of an angel. It probably was written in the 18th century.
True Black Magic is a goetic adaptation of the Key of Solomon. In the book, claims are made that the manuscript was found in the tomb of Solomon, and it was translated from the Hebrew in 1750 by the magus Iroe- Grego. It includes 45 talismans, their properties and uses, and “all magical characters known unto this day.” The grimoire quotes Solomon as saying that divine love must precede the acquisition of magical wisdom.