Cole and the Cactus Thief

Unable to rest on his laurels, Martin finds himself involved in the suspicious deaths of two local councillors. Martin knows the two were linked by the case he was investigating, but was it coincidence they both seemed to have died of heart attacks within a day of each other? And why was Councillor Patton's car where it was when he was found dead at the wheel? Martin has a major puzzle on his hands. Not to mention the thorny problem of who is stealing prize-winning cacti from Roselake's greenhouses. Book 4 of the Martin Cole series.