This second book in Kay Kenyon's science fiction series "The Entire and the Rose" follows the efforts of Titus Quinn, a former pilot, to save the Earth and ultimately bridge the gulf between our world and the Entire, a strange universe bordering ours. The Entire is ruled by the Tarig, tall insectoid authoritarians, but many other alien species live there, too, and the secondary characters in this novel are among its strongest features. My favorites are Riod, a creature "ridden" by Quinn's daugher Sydney, and Mo Ti, a former warrior whose powers are now in Sydney's service, whether she agrees with him or not.
Sydney, the ambitious estranged daughter, remains a central character and one of my favorites; her choices resonate through the book. Her mother, Johanna, her mother, is a particularly touching figure, heroic in her loneliness and conflicted cares.
As others have said, Kenyon's powerful worldbuilding elevate the series; particularly noteworthy is the River Nigh, a means of traveling transcendant distances, but only at the cost of its navigators' sanity. The River has mythical aspects and is beautifully described. The Inyx, to which Riod belongs, are a herd species that shares consciousness, but often in science fiction. such group species are described in insect terms or are largely abstract. The Inyx contain clear individuals and are tied to the animal world, an unusual approach that's very successful.
The plot revolves around whether Quinn should use the nan he brought back to the Entire in order to destroy it and counter the Tarig plan to use Earth as fuel. Underlying the action are concerns about loyalty and the knowledge that drives it; problems of information abound, and true to a story about a multi-braned universe, there are many "sides" to the plot equation. Looking forward to Book Three of this complex and satisfying series.