An excellent book! Julie Czerneda, winner of Canada's Aurora Award, has created a unique tale where the principles of biology underscore the essential mystery of the story.
Dr, Mackenzie Connor, known as "Mac" to her colleagues, is a research biologist, specializing in salmon spawning. Unfortunately, her research is disrupted by a visiting Drhyn, looking specifically for her. Brymn is giant, alien and blue (Ms. Czerneda is known for her ability to bring aliens to life on the page, and she succeeds again here; Brymn has a sense of humour, he is enthusiastic about his specialty and interests, he even lies when he thinks he should, to her and to his own kind--which all sounds very human, but his motives are entirely alien). He is an archaeologist who is investigating a series of disappearances occurring along a space lane which leads to his planet as well as to others. At one end of this lane--a wormhole-like technology that transects areas of space, enabling faster-than-light space travel--is the Chasm, a region of space where planets have somehow been denuded of life in the past.
Mac knows very little of this, but Brymn's visit triggers a series of incidents that draw her directly into the mystery: another alien species tries to kidnap her in the night, a human bureaucrat arrives who seems to be something other than what he claims to be, and intruders invade the living/research space of her base on the Canadian West Coast. For the sake of her species, and herself, Mac finds that she must join Brymn in his search for answers, and eventually leaves Earth in this quest.
But this novel isn't about an ordinary quest. It deals with the far-reaching issues of biological determinants in people who are otherwise intelligent, even among Mac's own colleagues. One of my favourite lines in this novel is Mac's response to a textbook on alien reproduction: "Nature found the most ridiculous ways to propagate. Adding intelligence and culture to biology seemed only to compound the issue, not simplify it" (p. 273).
This level of perception about living beings, including those not of this particular world, is what gives this novel its own life. The journey Mac makes is that she learns more about what constitutes being human, as well as alien, in her experiences off world.
Since the story hasn't finished with the end of this novel, I truly look forward to reading its sequel.