From the publisher's website: The gadgeteer is a staple of four-color comics and a popular choice for RPG superheroes. Gimmick's Guide to Gadgets builds on the gadget rules for Mutants & Masterminds by introducing two new powers, Spontaneous Invention and Scientific Genius, and expanding the device construction rules. In addition to new rules material, the book also includes hundreds of ready-made gadgets that can be dropped right into any campaign. Designed by fan-favorite Mike Mearls, Gimmick's Guide to Gadgets adds a whole new dimension to your Mutants & Masterminds game.