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The Secret Adversary (original 1922; edition 1922)
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Amazon.com Product Description (ISBN 0553122479, Mass Market Paperback)Where is Jane Finn? The mere mention of her name produced a very strange reaction all over London. So strange, in fact, that Tommy and Tuppence deceided to find this mysterious missing lady. And once those two determine sleuths made up their minds, nothing could stop them -- not international espionage, kidnapping...or even murder.
(retrieved from Amazon Thu, 20 Jan 2011 13:25:50 -0500)
Hiring themselves out as "young adventurers" proves to be a smart move for Tommy and Tuppence. All Tuppence has to do in their first job is take an all-expense paid trip to Paris and pose as an American named Jane Finn. But with the assignment comes a bribe to keep quiet, a threat to her life, and the disappearance of her new employer. Now Tuppence's newest job is playing detective.
(summary from another edition)
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