It has been many years since the Moon was thrown out of the Earth's orbit. The inhabitants of Moonbase Alpha have become a generational station with the hope that future generations can keep the station running. They are starting to realize that their ships, called Eagles, which were created for short hops between the Earth and the Moon, are starting to malfunction. They were not made for the stresses of deep space flight. Computer is also starting to malfunction with strange read outs. A ship of refugees from the planet Psychon land on the Moon. Maya, Alpha's head of Science, is astonished to see her brother commanding the ship. She thought she was the last Psychon after her home world destroyed. This puts more tension in her relationship with Tony Verdeschi, head of security. They have been unsuccessfully trying to have a child, but human and Psychon DNA are not comparable. Commander Koenig is hopeful that the Pyschon's will exchange their advanced technology for supplies and help in repairing their vessel. Unfortunately the Psychon's have something else in mind.

This is a hard science fiction novel with a lot of detailed explanations of how everything works on Moonbase Alpha yet it moves at a rapid pace. The dialog is intelligent and written the way the characters would speak on the television show.

The book was written as if it was the first episode of the third season. It answers some questions regarding the changes between seasons one and two and rectifies some of the problems with the second season.

There are a few plot holes, but I enjoyed the book non-the-less. I recommend it to Science Fiction fans and especially to Space 1999 fans. ( )