This book is a dictionary for the art of Gematria, or interpreting numbers as standing for words. This is not an easy pursuit, but this book helps a great deal. The first part is an article on Gematria (which takes its name from the fact that the Hebrew letter Gema, equivalent to Gamma or C/G, stands for the number 3), a basic description of how it works and why it's important. The third part is a dictionary of commonly used Hebrew magickal words, listed by number. The second part is the meat of the work: Liber 777, a magickal dictionary. Here we find that every number from one to 32 corresponds to a particular name, scent, element, tarot card, &c. An experienced magus can use these correspondicies to create a spell more effectively.