The three laws of Robotics: 1) A robot may not injure a human being or, through inaction, allow a human being to come to harm 2) A robot must obey orders given to it by human beings except where such orders would conflict with the First Law. 3) A robot must protect its own existence as long as such protection does not conflict with the First or Second Law. With these three, simple directives, Isaac Asimov changed our perception of robots forever when...

Incredible story of a new breed of man who creates a new force fro galactic government. In this struggle for power amid the chaos of the stars, man stands at the threshold of a new, enlightened life

A description of the sun, the star of our solar system, which includes information on its origin, physical composition, and characteristics, as well as on studies made of the sun by instruments and satellites.

At last, the costly and bitter war between the two Foundations had come to an end. The scientists of the First Foundation had proved victorious; and now they retum to Hari Seldon''s long-established plan to build a new Empire that the Second Foundation is not destroyed after all-and that its still-defiant survivors are preparing their revenge. Now the two exiled citizens of the Foundation-a renegade Councilman and the doddering historian-set out in...

Discusses the nature and causes of acid rain, its harmful effects, and possible ways to prevent it.

Examines the many facets and puzzles of our Moon, including its phases and eclipses, its early discoveries and modern exploration, and its possible origins and future prospects.

The Foundation Trilogy spans more than a thousand years in the history of an ideal universal ruling organization.

This book introduces the fourth largest known planet in the solar system.

Continues the Foundation trilogy. Golan Trevise, former councliman of the First Foundation, is entrusted with formidable task--to determine the future of Galactic development.

Elijah Baley has faced Departmental hostility since his return to Earth from the planet Solaria, where he solved the first murder to be committed in 200 years. Against his will, a hyperwave drama was made of the case, thanks to Delmarre, the murder suspect whom he proved innocent.