"The Riyria Revelations" is a fantasy book series written by Michael J. Sullivan. It follows the adventures of two main characters, Hadrian Blackwater and Royce Melborn, who are skilled thieves and unlikely heroes. The series is set in a richly developed world filled with magic, political intrigue, and ancient mysteries. The story begins with the duo being hired to steal a valuable artifact, which leads them into a larger conflict involving kingdoms, powerful figures, and dark secrets. The series is known for its engaging characters, intricate plotlines, and themes of friendship and loyalty, making it a popular choice among fantasy readers.