"Shatterproof" is the fourth book in the "39 Clues" series, specifically the "Cahills vs. Vespers" sub-series. Published in 2012 by Scholastic, Incorporated, this compact disc audiobook is an unabridged edition in English. Authored by Roland Smith, the book falls under the genre of juvenile fiction, with topics including family, historical ancient civilizations, and action and adventure. This thrilling installment is sure to captivate young listeners with its engaging storyline and dynamic characters.
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