The beautiful spiral shells of these long-extinct marine invertebrates are among the most sought after and recognizable of fossils, yet little has been published about ammonites outside of geological journals. Neale Monks and Philip Palmer look at the latest ideas on ammonite biology and ecology to present this detailed picture of a once diverse and widespread group of animals. Though an ammonite looks like a nautilus, the animal inside the shell was most closely related to today's octopus, squid, and cuttlefish. The authors describe the evolution of ammonites and their relatives and explain how they created their shells and used them as flotation devices. All the major groups of ammonites are described and illustrated (as are many minor ones), and important material is included on anatomy, feeding, reproduction, and pathology. The 300-million-year existence of ammonites ended at around the same time that dinosaurs became extinct. Fortunately, ammonites were once so abundant that their fossilized shells can be readily found, and the authors provide a helpful guide to locating and collecting these unique fossils.

Winner of the Lambda and Tiptree Awards • “A knockout . . . Strong, likable characters, a compelling story, and a very interesting take on gender.”—Ursula K. Le Guin Change or die. These are the only options available on planet Jeep. Centuries earlier, a deadly virus shattered the original colony, killing the men and forever altering the few surviving women. Now, generations after the colony lost touch with the rest of humanity, a company arrives to exploit Jeep—and its forces find themselves fighting for their lives. Terrified of spreading the virus, the company abandons its employees, leaving them afraid and isolated from the natives. In the face of this crisis, anthropologist Marghe Taishan arrives to test a new vaccine. As she risks death to uncover the women’s biological secret, she finds that she too is changing—and realizes that not only has she found a home on Jeep, but that she alone carries the seeds of its destruction. . . . Ammonite is an unforgettable novel that questions the very meanings of gender and humanity. As readers share in Marghe’s journey through an alien world, they too embark on a parallel journey of fascinating self-exploration. “A powerful story of connection, allegiance, and obligation. Read Nicola Griffith’s book—and keep an eye out for her name in the future.”—Vonda N. McIntyre “A marvelous blend of high adventure and mind-boggling social speculation.”—Kim Stanley Robinson

Additional title page description: Some Late Jurassic and Early Cretaceous ammonites date the Buchia zones and furnish correlations with the Boreal and Tethyan Realms.