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I probably read this book as a mass market paperback, late 1980s.

A friendly pair of aliens from another universe crashes on the moon; we take it in on our moonbase. It is pursued by a violent, conquering race of aliens. These latter attack our moonbase one at a time, in increasing rank: first a trooper, then a sergeant, then a captain, finally a general (or ambassador). The aliens are universe hoppers, from another universe (not a "parallel universe" as in sideways-in-time stories, just a separate spacetime), and this was the first time encountering our universe. The aliens do increasing amounts of destruction to the moonbase yet we destroy each one -- until the ambassador comes and we make peace, somehow or other.

I believe the element fluorine had something to do with this, as a weapon of some kind that we used against the conquerors. (This is not Alien from the Stars which also touches on fluorine).

I also remember a scene where the friendly alien was complaining about being trapped in its suit.

Holographic recordings of corridors in the moonbase were used by the humans reconstructing what happened after an attack.

The author is NOT Jeffery Carver, or Robert Drake, or R. L. Fanthorpe.

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Book cover, paperback

"Target" by Janet Morris and David Drake (1989)

REFUGEE FROM ARMAGEDDON

Sam Yates' job -- Commissioner of Security for United Nations lunar headquarters -- was a pretty boring one ... until mankind's first extraterrestrial visitor arrived on the moon asking for political asylum.

Now, everyone wants a piece of the action; scientists, soldiers, and spies from both the U.S. and U.S.S.R. are determined to study the alien. But the petty conflicts of humanity are the least of Yates' worries ...

The hunters are coming. Warlike, inhuman, light-years beyond us in science and technology, they will destroy anything that comes between them and the alien prey.


The hostile aliens use trans-dimensional weaponry, or weapons that can bend spacetime. The book has one of the aliens using his own weapon to beam a message back to his superiors, since the laws of physics in our universe are so different they won't allow a "normal" message sending.

I believe fluorine was used to kill the first hostile alien, or cause him to retreat to a crater on the Moon.

  • Thank you! The cover is instantly recognizable; that's the story. – Ross Presser Jul 2 '15 at 19:51

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