For generations, the solar system—Mars, the Moon, the Asteroid Belt—was humanity’s great frontier. Until now. The alien artefact working through its program under the clouds of Venus has emerged to build a massive structure outside the orbit of Uranus: a gate that leads into a starless dark. Jim Holden and the crew of the Rocinante are part of a vast flotilla of scientific and military ships going out to examine the artefact. But behind the scenes, a complex plot is unfolding, with the destruction of Holden at its core. As the emissaries of the human race try to find whether the gate is an opportunity or a threat, the greatest danger is the one they brought with them.

As tension between Mars and Earth mounts, and terrorism plagues the Martian city of Londres Nova, sixteen-year-old David Draper is fighting his own lonely war. A gifted chemist vying for a place at the university, David leads a secret life as a manufacturer for a ruthless drug dealer. When his friend Leelee goes missing, leaving signs of the dealer's involvement, David takes it upon himself to save her. But first he must shake his aunt Bobbie Draper, an ex-marine who has been set adrift in her own life after a mysterious series of events nobody is talking about. Set in the hard-scrabble solar system of Leviathan Wakes and Caliban's War, Chemistry deepens James S. A. Corey's acclaimed Expanse series.