The blog of the Science Fiction Society of Northern New Jersey has a lot of love for Eric Brown. First they reviewed Eric Brown's Helix.
Helix combines both concepts with a superb sense of character and story that are hallmarks of the Eric Brown style of science fiction. The characters, whether human or alien, are real and honest: just plain folks who do not seem forced, archetypical, or unrealistic. Much like Kethani, Helix explores more than just the normal tropes of science fiction, it turns the genre on and kicks it up a few notches. At once a bold human interest story and an action adventure story, Helix has something for every reader.
And they've also given a wonderful review of Kéthani:
"430 pages of deep thought, philosophy, and high concept science fiction await you if you pick up Eric Brown's Kethani, and if that sort of thing appeals to you as much as it did to me, then I highly recommend that you grab a copy and gobble it up."