The Phantom Hollow by Gerald Verner
The first book in the Trevor Lowe series
When Tony Frost and his colleague Jack Denton arrive for a holiday at Monk’s Lodge, an ancient cottage deep in the Somerset countryside, they are immediately warned off by the local villagers and a message scrawled in crimson across a windowpane:
‘THERE IS DANGER. GO WHILE YOU CAN!’
Tony invites his friend, the famous dramatist and criminologist Trevor Lowe, to come and help — but the investigation takes a sinister turn when the dead body of a missing estate agent is found behind a locked door in the cottage.
Gerald Verner (1897-1980) was the pseudonym of British writer John Robert Stuart Pringle. Born in London, Verner wrote more than 120 novels that have been translated in over 35 languages, and many of his books have been adapted into films, radio serials and stage plays. Verner also wrote forty-four Sexton Blake tales.