Thieves' Picnic is a mystery novel by Leslie Charteris featuring his Robin Hood-inspired crime fighter, Simon Templar, alias "The Saint". The book was first published in the United Kingdom in 1937 by Hodder and Stoughton, and in the United States by The Crime Club the same year. Later editions of the book were retitled The Saint Bids Diamonds; another alternate title is The Saint at the Thieves' Picnic.
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