The impossible puzzle...

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...

Gerald Verner (1897-1980) was the pseudonym of British writer John Robert Stuart Pringle. Born in London, Verner wrote more than 120 novels that have been translated in over 35 languages, and many of his books have been adapted into films, radio serials and stage plays. Verner also wrote forty-four Sexton Blake tales.

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