‘DON SHAW’S THE GOLDEN KEY’
An ‘armchair treasure hunt’ published in 1982 which is unsolved as of August 2021. No time limit was specified.
In 1989 Shaw closed the hunt, dug up the key, and repossessed the £50,000 prize money
The front cover of ‘The Golden Key’
There is still an active group of searchers, contact wolstan-
Gordon Hooke, the copyright holder, died in 2014 aged 95. It is unclear who now owns the copyright.