It's been two-hundred years since the deadly Thread fell like rain upon Pern, devouring everything in its path. No one alive remembers that first horrific onslaught and no one believes in its return--except for the dragonriders. For two centuries they have been practicing and training, passing down from generation to generation the formidable Threadfighting techniques. Now the ominous signs are appearing: the violent winter storms and volcanic eruptions...

Human agents infiltrate the Hivers, an aggressive alien race of insectoid species, to study their culture and defeat them. Or better still, learn to communicate with them and reach a modus vivendi.

Beloved by millions of readers, Anne McCaffrey is one of science fiction's favorite authors. Writing with award-winning author Elizabeth Ann Scarborough, she has created the bestselling Acorna series focusing on the adventures of the brave unicorn girl. Now the exciting saga of the next generation begins. First WarningKhorii, daughter of the near-mythic Acorna and her lifemate, Aari, must contend with an overwhelming legacy to forge a path of her...

In the fourth book of the Tower and Hive series, the Lyon clan must use their combined telepathic abilities in a battle against the alien Hivers.

Leaving Petaybee to help rescue a family friend, selkie twins Ronan and Murel are imprisoned by the Company, which wants them as workers, and an unscrupulous scientist, who hopes to study their unusual shape-changing talent.

Sean Shongili and his children, Ronan and Murel, must draw on their changeling ability to transform into seals when a mysterious race of aliens is discovered to be living in the depths of the ocean on the planet Petaybee.

Pellar is an orphan taken in by Masterharper Zist. Though born mute, Pellar is a gifted tracker, and when Zist sets off to take over as haarper for Natalon's coal-mining camp, Pellar--along with his fire-lizard, Chitter--joins him on a secret mission of his own: to find out if reported thefts of coal are the work of the Shunned, criminals condemned to a life of wandering and hardship.

On Botany, a planet of humans and aliens, preparations are underway for an expedition to liberate Earth from the cat-like Cattani. The heroes are a human-alien couple, Kris Bjornsen and Zainal, a renegade Cattani. Third novel in a series.

When Nimisha takes an experimental ship on a solo test flight, something goes horribly awry, marooning her light-years from home on a planet as deadly as it is beautiful.

A shellperson named Tia searches for the EsKays, a star-faring race whose fate is a mystery and to seek out whatever it was on the EsKay planet that caused her neural disorder. Then she plans to eliminate it so that no other child will ever suffer her fate.