Many amateur astronomers are short of time. A full-time career usually takes up most waking hours, and often there simply isn’t time for leisurely observing.

"Rarely has Heinlein pushed his imagination further...a vivid, stirring experience."--Chicago Tribune "One of the superb Heinlein stories that has excitement, u

Lucy Clairmont's family treasured the magic of the past, and her childhood fascination with stories of the high seas led her to become a marine archaeologist. B

High school students enter a time gate to an unknown planet for a survival test, but something goes wrong and they have to learn to survive by their own resourc

For a telepathic twin on an exploratory space voyage only a few years pass, yet, when he returns to Earth his brother is ready to celebrate his ninetieth birthd