"A Foundation Book." When young Hari Seldon arrives on Trantor, he is unaware of the perilous politics that are brewing. After he presents his paper on psychohistory, he becomes the most wanted man in the Empire.

Sequel to: Foundation edge. Continues the Foundation trilogy. Golan Trevise, former councilman of the First Foundation, is entrusted with a formidable task--to determine the future of Galactic development.

Here, Isaac Asimov, one of the Grand Masters of science fiction, tells us the stories of the robots of which he dreamed, from the first days of their creation to the days of their ultimate sophistication.

From two of science fiction's most celebrated and brilliant minds-Isaac Asimov and Frederik Pohl-comes the second edition of Our Angry Earth, a comprehensive analysis of today's environmental threats and a guide on how we can heal our planet, with an introduction and afterword from New York Times bestselling author Kim Stanley Robinson. Our Angry Earth provides a candid picture of the present and many possibilities for a better, cleaner future....

From the writer whose name is synonymous with the science of robotics comes five decades of robot visions-36 landmark stories and essays, plus three rare tales-gathered together in one volume.

Traces the scientific discoveries that led to our understanding of photosynthesis and how this process relates to the food supply, changing ecological balance, and threats to the Earth's atmosphere.

Chronicles the period of European history known as the Dark Ages, from the fall of the Roman Empire through the reign of Charlemagne and his successors to the first glimmer of a new age in 999.

Examines the mass extinction of dinosaurs and offers a possible explanation of the causes.