So far the Foundation was safe. But there was a hidden Second Foundation to protect the first. The Mule has yet to find it, but he was getting closer all the time. The men of the Foundation sought it, too, to escape from Mule's mind control. Only Arkady, a 14 year-old girl seemed to have the answer, or did she ...?

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...

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

This book gives a description of Earth, the third planet from the sun, including information on its origins, composition, and unique characteristics.

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

An up-to-the-minute examination of our home galaxy, the Milky Way, and the billions of other galaxies that populate the universe. Summary adapted from p. [4] of cover.

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

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.

This book begins with the earliest speculations and investigations of matter by the Greeks and Romans, and then, step by step and century by century, it traces the path of discovery that revealed more and more of the nature of the atom, of light, of gravity, or the electromagnetic force and even the nature and structure of the universe. It also encompasses such phenomena as light and electricity; the protons, neutrons, and quarks that are the fundamental...