Down the hatch

"Private detective Agatha Raisin, having recently taken up power-walking, is striding along a path in Mircester Park during her lunch break when she hears a cry for help. Rushing over, she finds an elderly couple, Mr. and Mrs. Swinburn, in the middle of the green--with the body of an old man lying at their feet. The man, who the coroner determines died by poisoning, was known as the Admiral, a gardener notorious for his heavy drinking, and Chief Inspector Wilkes writes the death off as an accident caused by the consumption of weedkiller stored in a rum bottle. Agatha is not convinced that anyone would mistake weedkiller for rum but carries on with her work at Raisin Investigations"--Publisher.