Murder at Monk's Barn (Book 1)

''Murder at Monk's Barn'' (1931) by Cecil Waye (John Rhode/Miles Burton) is a classic Golden Age mystery featuring detectives Christopher and Vivienne Perrins. They investigate the shooting of businessman Gilbert Wynter, killed through locked curtains in his home, tackling a baffling "impossible" scenario, a second poisoning, and a limited suspect pool. Gilbert Wynter is shot through thick, drawn curtains while shaving in his home, Monk's Barn Local police suspect a former servant, but Austin Wynter (the victim's brother) hires private investigators Christopher and Vivienne Perrins.
The killer managed to shoot the victim from a locked garden with no apparent exit, creating a "locked-room" style mystery. Vivienne Perrins is portrayed as the intelligent, driving force behind the partnership, which collaborates with police inspector Philpott. The story includes a second murder via poisoned chocolate, domestic tensions, and a budding romance for Vivienne. This novel is the first in the "Perrins, Private Investigators" series by Cecil Waye (John Rhode) and is known for its clever puzzle.