This collection of three thoroughly enjoyable novellas by William Fitzgerald Jenkins (aka Murray Leinster) focuses on the characters of Calhoun, from the Interstellar Medical Service, and his diminutive furry companion Murgatroyd, a tormal. Together, they travel in the medical ship, Esclipus Twenty, to perform routine planetary health inspections—but the various crises they encounter are anything but routine.

Stories include “The Grandfathers’ War”, “Med Ship Man”, and “Tallien Three.”

In responding to an emergency call for medical assistance, Calhoun and Murgatroyd find themselves caught in the middle of an interplanetary war between generations. After their sun was predicted to explode in the near future, the Phaedrans sent their children to the Canis system to begin colonizing its third world. Afterward, the elders continued to ship out children and grandchildren until the new colony become overburdened and could no longer adequately feed or care for them, resulting in an outbreak of disease—and rebellion. As Calhoun works to manufacture a cure in his med ship, he must also stop a pending invasion by the elder Phaedrans in “The Grandfathers’ War.”

In “Med Ship Man,” Calhoun and Murgatroyd land in what appears to be an abandoned spaceport on the planet Maya and are later joined by an arrogant, wealthy businessman from an orbiting cargo vessel. As Calhoun pieces together the reason for the abrupt disappearance of the citizens of Maya City, he realizes that a technology imported from another planet might have frightened the people into abandoning their lands—and that the businessman knows more about the scheme than he’s willing to admit.

While attempting to land on the planet, “Tallien Three,” to perform a long overdue health inspection, Calhoun learns that an uprising is in progress committed by a growing group of mentally ill citizens called  “paras.”  While the government works to find a vaccine for this pathogen, Calhoun learns that the planet’s chief scientist might himself be a para. Can Calhoun make his way back to his ship and find a cure before he, too, succumbs to insanity?