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Overview

In the 22nd century, the people of Earth inhabit giant, fusion-powered cities sprawling across the planet. In addition, they are hosting the Cephians: advanced plantlike aliens who have come to assess humankind’s readiness for joining their galactic community. Although they are friendly, the aliens have been in the solar system for forty years, and humanity’s patience and trust are wearing thin, at times violently so.

Eminent astrobiologist Dr. Shana Savarino feels otherwise. She admires the...