"Grimnoir" is a fantasy series written by Larry Correia that blends elements of magic and noir detective fiction. Set in an alternate version of the 1930s, the story features a world where magic, known as "Grimnoir," exists alongside advanced technology. The series follows a group of characters with unique magical abilities as they navigate a society filled with crime, corruption, and supernatural threats. The main protagonist, Jake Sullivan, is a former criminal turned hero who uses his powers to fight against dark forces. The series explores themes of morality, power, and the consequences of one's choices, all while delivering action-packed adventures and intricate plots.