A collection of six science-fiction authors chronologically placed, this book deals with the prominent works of the authors and the characters in their books. Robots, time-traveling, space walks, atoms and molecules-the book has everything for a sci-fi fan. The reader should simply sit back with this book in hand and get ready for a flight into space. The adult mind is sure to form covalent bonds with the extremely engaging activities that make this book difficult to put down.