[Madam Broshkina]

From alibris.com:

"Rain is responsible for a great deal more than the mere growth of vegetables -- it is a controller, if a somewhat capricious controller, of man's destiny." Thus begins Elliott O'Donnells' novel, "The Sorcery Club" and thus begins the story of Leon Hamar who is forced to take refuge in a second-hand bookstore to avoid the rain and there ends up acquiring a curious book on the black arts in Atlantis. Hamar and his two friends study the book and the information contained therein with surprising and frightening results.