First published 2007
Lise Adams has spent ten years wondering what happened to her father on the mysterious planet connected to Earth through the towering Arch. This world was built by the enigmatic Hypotheticals to house human settlers, who now strip oil from Equatoria's western deserts. When Lise teams up with Turk Findley, a former sailor turned drifter, cometary dust begins raining down across the planet's surface. The dust carries microscopic Hypothetical machines that will transform their seemingly safe new home. As these alien devices activate, time itself starts bending in dangerous ways. Lise must solve the puzzle of her father's fate while the planet becomes increasingly hostile. The same mysterious forces that created this world now threaten to remake it entirely.
Genres: science-fiction, adventure, mystery, thriller
Vibes: atmospheric, suspenseful, thought-provoking
Tropes: found-family, mystery
Setting: Equatoria, Earth
Period: 21st-century
303 pages · Hardcover · Tor Books