The Templeton twins have an idea:
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Bibliographic Details
Main Author: Weiner, Ellis (Author)
Other Authors: Holmes, Jeremy (Illustrator)
Format: Book
Language:English
Published: San Francisco, Calif. Chronicle Books 2012
Series:The Templeton twins / Ellis Weiner 1
Subjects:
Item Description:Abigail and John, the Templeton twins, and their dog Cassie, foil a pair of inept kidnappers intent on stealing one of their father's newest inventions.
Physical Description:227 S. Ill.
ISBN:9780811866798

There is no print copy available.

Interlibrary loan Place Request Caution: Not in THWS collection!