The Seventh Secret Hardcover – January 15, 1986 by Irving Wallace
 
Every week a tall, attractive, older woman named Evelyn Hoffmann make her regular visit to the bustling downtown district of West Berlin....Irving Wallace, whose books have sold over 200 million copies, is one of the most widely read authors in the world. His best-sellers include The Chapman Report, The Prize, The Man, The Word, The Second Lady, and, The Miracle.