Thirg, the notorious philosopher, knows there are alien beings on other worlds on the other side of the sky. When aliens do arrive, Thirg's heretical and danger

An interplanetary probe in the twenty-first century lands on Titan and discovers an alien civilization established there long ago.

10-year-old Negi Springfield has just graduated from a British school for wizards. After meeting with the school headmaster to discuss his graduate work assignm

Hypothetical Spacecraft and Interstellar Travel collects information about the latest and greatest hypothetical spacecraft.

"[Hogan] once again demonstrates his mastery"-Publisher's Weekly **** ..".on the cutting edge of technology...Hogan's talent carries the reader from peak to pea