A Matter for Men 'The War Against the Chtoor' Book I -David Gerrold (Star Trek 'The Trouble with Tribbles writer)

Timescape Books Simon and Schuster

Very Good, Classic / Vintage SciFi softcover approximately 5-1/2 x 8 - 3/8  x 1 -1/8 399 pages by the author of the Star Trek episode 'The Trouble with Tribbles'

Dedicated to Ginny and Robert Heinlein

With the human population ravaged by a series of devastating plagues, the alien Chtorr arrive to begin the final phase of their invasion. Even as many on Earth deny their existence, the giant wormlike carnivores prepare the world for the ultimate violation--the enslavement of humanity for food!