"Comets, Creators and Destroyers" by David H. Levy.
Softcover, ex-library edition, minor shelf wear - good clean used copy and binding. 256 pages with photos and illustrations.
From the Booklist description -
After a comet he codiscovered crashed into Jupiter in 1994 (chronicled in Levy's Impact Jupiter,
1995), the author became a popular expositor about the icy harbingers
of catastrophe. Because two disaster movies starring comets are
calculated to hit theaters this summer, the publisher is positioning at
ground zero Levy's inexpensive introduction to the subject. Appealing
to readers who, just having seen Mother Earth demolished on the big
screen, want to know how threatening comets are in reality, Levy
explains how astronomers developed an understanding of their real
nature and locations in the solar system, their possible role in
supplying the earth's life-giving water and carbon, and the evidence of
their contribution to cataclysmic extinctions. (The library must-have
regarding the dinosaurs' demise is T. Rex and the Crater of Doom
by Walter Alvarez, 1997.) Levy's excitement should rub off on readers
getting their first taste of facts and superstitions about comets. An
easy call: this will circulate in any library.