Unfinished 1960s 'Die drei ???' Story Published After Over 50 Years

A shelved 1969 manuscript has been completed and released as a new book in the beloved youth detective series.

The story, 'Die drei ??? und das Geheimnis von Black Mesa,' was originally conceived by William Arden in the late 1960s but left incomplete due to disagreements with the American publisher.
Author and researcher C.R. Rodenwald adapted the 1969 outline into a full novel, preserving the tone of the series' early years.
Set during the timeline of the earliest 'Die drei ???' cases, the plot follows Justus, Peter, and Bob as they investigate a mysterious ghost town during a camping trip in the Sierra Nevada.
The book is part of Kosmos Verlag's 'Nostalgie-Edition,' appealing to fans nostalgic for the series' classic phase, often referred to as its best era.
It remains unclear whether a corresponding audio drama will be produced, though the series continues to see strong demand for its cassette, vinyl, CD, and streaming releases.