Title: The case of the million-dollar mystery
Description: Eddie Becker has the idea of a lifetime, and creates plans for what he promises is going to be a million-dollar invention. Then the plans get stolen. Worst of all, after Jigsaw does some digging, he suspects the principal may be the thief! Now Jigsaw has to invent a gadget of his own to find out the truth.
Subjects: Schools, Juvenile fiction, Inventions, Mystery and detective stories, Fiction, Children's fiction, Schools, fiction, Inventions, fiction, Schools -- Fiction, Schools -- Juvenile fiction, Inventions -- Juvenile fiction