Wikipedia
Usage examples of "bravais".
John Bravais is a kind of super-spy called on by an associate in Algeria to help investigate why soldiers are going missing from the battlefield.
What Bravais quickly discovers is a conspiracy by aliens and their human confederates to harvest brains as onboard guidance units for weapons in an interstellar war.
After much exciting hounds-and-fox action on Earth, Bravais is himself eventually harvested, waking as a cybernetic tank on a lunar battlefield.