Abarrach, the Realm of stone. Here, on a barren  world of underground caverns built around a core of  molten lava, the lesser races — humans, elves,  and dwarves — seem to have all died off. Here, too,  what may well be the last remnants of the once  powerful Sartan still struggle to survive. For Haplo  and Alfred — enemies by heritage, traveling  companions by necessity —...

An assassin and the royal child he has been hired to kill form an unlikely and unstable alliance as the plots of human sorcerers, elven pirates, and dwarf revolutionaries threaten to overwhelm the airborne kingdoms of Arianus.

"Stephen Hawking guides readers through some of the biggest questions in the universe"--

This documentary series explores the history of science and how we found our place in the cosmos.

When Uncle Al is kidnapped by Dr. Kron-Tox and sent to prehistoric times, Andrew, his cousin Judy, and Thudd the robot try to use Uncle Al's latest invention, the Time-A-Tron, to rescue him, and learn first-hand about the origins of the universe.

"How many stars are in the sky? How did the universe begin? Where did it come from? This is the story of Edwin Hubble, a boy fascinated by the stars who surmounted many hurdles to follow his dreams of becoming an astronomer. Using the insights of great mathematicians and endlessly observing the sky, he succeeded in confirming two things that altered human life forever: that there are more galaxies than our own, and that the universe is always expanding....

This illuminating volume carefully breaks down the features of the Milky Way galaxy. It explains such characteristics as size, shape, and age; examines planets, stars, and star clusters; and delves into such concepts as black holes and dark matter.

"A non-fiction introduction to the massive scale of the known universe" --

The Seventh Gate is the thrilling conclusion to the New York Times bestselling Death Gate Cycle by Margaret Weis and Tracy Hickman. In this tale of treachery, power, and heroism, Alfred, Haplo, and Marit embark on a journey of death and discovery as they seek to enter the dreaded Seventh Gate. Encountering enemies both old and new, they unleash a magic no power can control, damning themselves to an apocalypse of unimagined...