. . "Large type books." . . "Verner, Gerald" . . . . "The seven clues"@en . "The seven clues" . . . . . "Norris Jordan uncovers a fiendish plot and is about to give evidence to the British Government - but on his return to England he is murdered. Having anticipated this, however, he has concealed his evidence within an elaborate series of riddles, each leading to a scrap of vital information; the first going to his friend, Peter Clayton. Aided by the head of the Secret Service, Clayton struggles to solve the riddles - but the duo soon find that their very lives are at stake as the plotters try to silence them..." . . . "Mystery fiction" . "Large type books" . . . "The Seven Clues"@en .