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The Book of Secrets: Volume 1
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A Desperate Fortune
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The Fire
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The Secret Supper
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The Secret of the Skeleton Key
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The Hunt for the Missing Spy
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Mr. Summerling's Secret Code ...
Dori Hillestad Butler
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The Doomsday Key: A SIGMA...
James Rollins
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The Atlantis Code
Charles Brokaw
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The Atlantis Code
Charles Brokaw
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Talia's Codebook for Mathletes
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The Doomsday Key: A SIGMA...
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The Cryptos Conundrum
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The Code Busters Club, Case ...
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