The Mind Readers

The ancient hamlet of Saltey, once the haunt of smugglers, now hides a secret rich and mysterious enough to trap all who enter... and someone in town is willing to terrorise, murder and raise the very devil to keep that secret to themselves.
When a transistor thought to be the key to telepathic communication is found, Albert Campion is called to sort fact from fiction. But the device at the centre of the mystery is in the possession of two schoolboys and whether they stole it or invented it, there are others who will kill to get hold of it.
Private detective Albert Campion faces as deadly a challenge as any in his career.

Margery Allingham stands out like a shining light. Everything she writes has a definite shape...each book has its own separate and distinctive background (Agatha Christie)
Miss Allingham has a strong, well controlled sense of humour, a power of suggesting character with a few touches and an excellent English style. She has a sense of the fantastic, and is never dull (Times Literary Supplement)
The real queen of crime (Guardian)