Cult of the Comet
by Gary L Morton
Cult of the Comet is a full-length novel (122,000 words). It takes place in a dark future and features a fallen astronaut turned gritty private eye, and a cult leader on a mission to grab interstellar travel. A police state and evil elders rule most of the world. Mutants control the rest. The race is on as a comet, which is the final visitation of an alien race, heads for perihelion at earth.