Dr. Mackenzie Winifred Elizabeth Wright Conner (Mac), maroon clinician marvelous, has returned to the Norcoast research expertness after barely surviving her unearthing of the "true" nature of the Dhryn. Her friend, Dr. Emily Mamani, is still working with the mysterious Ro, who may be the key to terminating the Dhryn's murderous invasions. And Mac is struggling with a bit of post-traumatic stress as she tries to adapt to her former life. In the first book, Mac wanted nothing more than to study her maroon, but the universe simply refused to leave her alone. The same holds true in book two. An shock devastates Norcoast, and Mac finds herself drawn back into Interstellar Coalition issues once again. This term, she is brought to an I.U. group to help research how to contact the Ro and stop the Dhryn. But are the Dhryn truly evil, or simply responding to the uses of biology? And are the Ro really the defenders some believe them to be? There is a lot to love about this book. Czerneda's intruders are delightful as always, particularly the harsh & lovable Myg, Fourteen. The author's own background in biology serves her well as she designs separate species after another, from the terrifying metamorphoses of the Dhryn to the unique offensive capabilities of the Trisulians. Her talent for writing fully-developed, fascinating species makes the book worth commentary all by itself. In terms of plot, Transfer suffers a bit from second-book sign. At the expire of book separate, the Dhryn have been loosed upon the galaxy. Asteroids have been cane of life. Mac lost her part to a Dhryn and barely escaped with her life. Yet in the day separate of book two, we see very little about these sequents. As a work out, the determine feels slow. It takes a period to get Mac out of Norcoast and back into the midst of things. In book separate, when we didn't know what was happening, the author had more headway to develop the characters and build dilemma. This term, I was a bit impatient. Likewise, with the Species Imperative books being a single ambitious story, things are left unfinished at the expire. And yet I found the finish of Transfer more satisfying than the finish of Relic. The threat to homo sapiens and the I.U. is revealed to be even worse than before, but another, more personal plot lead is brought to resolution. Transfer is a holy writ by itself. Having also read the third book in the series, I can say that the trilogy is a both a highly satisfying story and a very impressive feat by the author.