"The Angel and the Dark River" is a novel by James S. A. Corey, part of the Expanse series. It explores themes of morality, choice, and the consequences of actions in a universe filled with political intrigue and conflict. The story follows characters navigating complex relationships and the impact of their decisions on a larger scale. Set against a backdrop of interstellar travel and advanced technology, the narrative delves into the struggles between different factions and the quest for power. The characters face personal and external challenges, highlighting the interplay between light and darkness in their lives and the universe around them.