"Hot-glue-gun fans will barely need the story that surrounds this new set of do-it-yourself gadget projects, but the continuing mystery will keep readers wanting more. (Adventure. 9-13)"
Determined to uncover the identity of the secret agent who seems to be right inside their uncle Newt's house with them, 11-year-old twins Nick and Tesla construct a variety of spy-revealing gadgets in this third of an ongoing mystery-and-how-to series.
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