5 books in series
Die drei Fragezeichen (Hörbücher)
Die drei Fragezeichen (Hörbücher) is a 5-book series with 5 released primary works first released in 1964 with contributions by William Arden, Robert Arthur, Alfred Hitchcock, Jens Wawrczeck, and M.V. Carey.
| #3 |  The Secret of Phantom Lake
| 4 | 2 reads | ||
| #4 |  Die Drei ??? und der Super-Papagei: 2004
| 4 | 1 read | ||
| #11 |  The Mystery of the Laughing Shadow
| 3 | 3 reads | ||
| #12 |  Den syngende slange
| 3.5 | 2 reads | ||
| #18 |  The Mystery of the Whispering Mummy
| 3.29 | 7 reads |