A Knock on the Door: A John Adam Mystery

John Adam, an analyst formerly employed by various agencies, corporations, and individuals, retires to his family home in a small town after his wife is killed in a car accident and he inherits a fortune from a distant relative. Feeling his age and determined to live quietly, he is induced to take a case for a government agency against his better judgment that soon involves him in crisscrossing international criminal issues including murder. Adam has the talent for asking the right question...