Die drei Fragezeichen (Original)

Die drei Fragezeichen (Original) is a 49-book series with 49 released primary works first released in 1964 with contributions by Robert Arthur, William Arden, Alfred Hitchcock, Jens Wawrczeck, Nick West, M.V. Carey, Marc Brandel, G.H. Stone, Megan Stine, Henry William Stine, and Peter Lerangis.