The Master Key: An Electrical Fairy Tale

Rob Joslyn is an amateur electrical tinkerer, wiring up batteries and motors with more enthusiasm than skill, when one bungled experiment does something no wiring diagram predicted: it summons the Demon of Electricity. Impressed rather than angry, the Demon offers Rob an extraordinary deal -- three gifts a week for three weeks, devices harnessing electrical power beyond anything on Earth -- and leaves the boy to decide what to do with power most adults could never be trusted with. What follows tests Rob's judgment as much as his ingenuity, gift by increasingly dangerous gift. L. Frank Baum's venture into science fiction, published between Oz books.