Star Trek—a vision of humanity's future that has captivated audiences worldwide for over a quarter century. Those audiences made Spock's World and The Lost Years, the first two Star Trek hardcover novels, nationwide bestsellers—and flocked by the millions to see Star Trek IV: The Voyage Home the most popular of all the Star Trek motion pictures.

Here now is Probe—an epic-length novel that at last picks up the story of the USS Enterprise and her crew where Star Trek IV left off. A novel that reveals the secrets behind the mysterious probe that almost destroyed Earth—and whose reappearance sends Captain Kirk, Mr. Spock, and their shipmates into unparalleled danger… and unsurpassed discovery.