Mac is a salmon biologist who runs a lab in the British Columbian wilderness. Her only concerns are her research and dealing with the owners of the land the lab is located on. She has no interest in anything off planet, even though space travel is a possibility for anyone who wants it. However, in Survival, everything changes. Friends become enemies and enemies friends, and Mac finds herself far beyond anywhere she ever thought she'd be. Caught up in an intergalactic mystery with no idea why she (a salmon scientist) was chosen, it is all Mac can do to keep it together. She is changing, but the scientist in her never leaves. Even if she finds her way back home, some parts of Mac will never be the same.

Migration finds Mac recovering from the events of the previous book and getting forced to take a vacation after a mysterious earthquake damages the research station. All she really wants to do is focus on salmon while trying to forget Emily's betrayal. No one seems to take her story about the dangers of the Ro seriously. Until she finds herself tracked down by a couple of aliens and accepted to join an intergalactic conference on the crisis situation in New Zealand. There she makes some new friends and begins to make headway. But so are the Drymn as they eat their way across planetary systems. Why are they doing this and what do the Ro has to do with it? These are only some of the questions Mac must answer, before the species' migration brings them to Earth and all Mac holds dear.

Regeneration brings the trilogy to a close. Mac and Nicholas continue their long-distance quasi-relationship as their responsibilities drag them to opposite ends of space. Mac has Emily back, but needs to keep her occupied as Mac herself travels to Myriam to investigate the Drymn's evolutionary past. But she never makes it. The Ro will do anything to stop Mac, even if Mac still hasn't figured out why. Meanwhile we learn a lot about the Drymn and how they lived before their fatal meeting with the Ro. Which is good, because what Mac does eventually figure out takes her back to Earth where the time for the final reckoning has come.

An excellent trilogy that combines evolutionary biology with the best kind of science fiction. Highly recommended for fans of science fiction with strong female protagonists, science fiction about science, or well-written stories. ( )