A certain Mr. Dawson entrusts the Kool and Lam detective agency with surveillance of his daughter. As a result, Donald Lamb has to deal with two crimes at once: blackmail and murder (“On Thin Ice”). In the novel “Widows in Mourning” we are also talking about blackmail; a woman's honor is affected. In order to understand such a delicate matter, Lamb needed all his resourcefulness and ingenuity. As, indeed, when investigating a case of drug smuggling (“Not all grass is green”). Justice was stumped, unable to find the main piece of evidence - the weapon. Donald Lamb is ahead of the police again.