Book 1

Survival

by Julie E. Czerneda

Published 4 May 2004

Book 2

Migration

by Julie E. Czerneda

Published 1 May 2005
Senior co-administrator of the Norcoast Salmon Research Facility, Dr. Mackenzie Connor was a biologist who studied the spawning habits of salmon. Then, last season, just as she and Dr. Emily Mamani were starting their research, they were interrupted by the arrival of Brymn, the first Dhryn to set foot on Earth.

And suddenly everything changed for Mac, Emily, Brymn, the human race, and all the member races of the Interspecies Union. Base was attacked, Em was kidnapped by the mysterious Ro, Mac nearly lost her life when she and Brymn escaped to the peaceful, isolationist Dhryn home world. But the Dhryn are in the process of abandoning it, hurtling out on an unfathomable path of destruction through civilized space.

As the enemy destroys life on planet after planet, the IU organizes a secret Gathering of every being with information on the Dhryn. With the data available there, Mac begins to suspect that the Dhryn's actions may be a response to something simpler and more deadly—the imperative to migrate. But even if Mac is right, can she and her team discover why this is happening and how to halt the Dhryn?

Book 3

Regeneration

by Julie E. Czerneda

Published 2 May 2006
With the alien Dhryn cutting a pathway through the inhabited spaceways-bringing about the annihilation of many of the races who have the misfortune to lie along the star trail they are following-time is running out for all sentient life-forms. Can biologists Mackenzie Connor and Emily Mamami solve the riddle of the Dhryn before their part of the galaxy becomes as dead as the mysterious region known as the Chasm?

Species Imperative

by Julie E. Czerneda

Published 2 September 2014
A threat to entire worlds. Where on that scale does one woman fall?

Dr. Mackenzie "Mac" Connor’s goal in life is to be left in peace to study her salmon and their migration. She has no interest in the Interspecies Union, space travel, or the mysterious Chasm, an expanse of dead worlds filled with the ruins of alien civilizations. The only cloud on Mac’s horizon is having to meet with the Oversight Committee to defend any research intrusions into the protected zones on shore.

But what Mac wants no longer matters. There’s another, darker, migration underway, this time across space. What created the Chasm has awakened once more, to follow its imperative to feed on living worlds. How can it be stopped?

Aliens have asked Mac to find that answer. She knows it may mean sacrificing all she loves, including Earth itself. She’s determined to find another way.

But, first, she must survive.

The Chasm of the past was only a trial run, for this species intent on replacing all life with its own. And they’ve learned her name.