What I believe is known as a locked room mystery, on an island.
The title is a reference to a "locked room mystery", a popular form of early detective fiction.
It is a locked room mystery of the subtype known as an "impossible crime".
This novel is a mystery of the type known as a locked room mystery.
The plot has the form of a locked room mystery.
Locked room mysteries are good clean fun, but I never heard of one happening in real life.
It is also the first locked room mystery in detective fiction.
The novel is a locked room mystery, which takes place at a wizards' convention.
Bel and the Dragon is perhaps the earliest example of a locked room mystery.
This version has been cited as an ancestor of the "locked room mystery".
