All Formats & Editions

This is one of the classic titles originally know as the "Heinlein Juveniles," written in the 1950 and published for the young adult market. It has since been in print for 50 years in paperback, and now returns to hardcover for a new generation.Travel to other planets is a reality,... Read Full Overview

Travel to other planets is a reality, and with overpopulation stretching the resources of Earth, the necessity to find habitable worlds is growing ever more urgent. With no time to wait years for communication between slower-than-light spaceships and home, the Long Range Foundation... Read Full Overview

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 birthday.

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 birthday.

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 birthday.

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 birthday.