Crew Extraction

Captain Alana Black helps relocate the Altien to a new cave away from the erupting volcano while waiting for her missing crew to reach the agreed pickup location south of the volcano.
But she runs out of time when a ship arrives above the Altien home world demanding she return the teens to the kidnappers.

A 11,100 word, 43 page (approximate) science fiction adventure novelette, Book IV in the Galaxy Freight series by Diane J Cornwell.