Title: Nick and Tesla's secret agent gadget battle
Description: Sibling sleuths Nick and Tesla work to expose a spy in their midst and must engineer spy gadgets in order to catch the culprit. The coauthor is Steve Hockensmith. Book #3
Subjects: Science, Juvenile fiction, Experiments, Brothers and sisters, Implements, utensils, Children's fiction, Brothers and sisters, fiction, Tools, fiction, Science, experiments, fiction, Fiction