At the close of the nineteenth century, American youths developed a growing interest in electricity and its applications, machines, and gadgetry. When authors and publishers recognized the extent of this interest in technology, they sought to create reading materials that would meet this market need. The result was science fiction written especially for young adults. While critics tended to neglect young adult science fiction for decades, they gradually came to recognize its practical and cultural value. Science fiction inspired many young adults to study science and engineering and helped foster technological innovation. At the same time, these works also explored cultural and social concerns more commonly associated with serious literature. Nor was young adult science fiction a peculiarly American phenomenon: authors in other countries likewise wrote science fiction for young adult readers. This book examines young adult science fiction in the U.S. and several other countries and explores issues central to the genre.