An Unholy Whiff of Death — Joyce Cato

When asked to judge the neighboring village's Flower Show, vicar's wife Monica Noble is thrilled, even if she can't tell a begonia from an azalea! This year, competition is fierce, and when her fellow judge, a well-liked vicar, is killed, Monica must wake up and smell the roses. A second murder quickly follows, this time a local scientist. Monica must help the local detective to solve the two murders and find the killer -- quickly, before anyone else dies.