Vicious Circle by Mike Carey is the second novel in The Felix Castor series, a blend of urban fantasy and noir detective fiction. Summary: Felix Castor, a freelance exorcist in London, is hired to find a missing ghost, which is unusual since ghosts don’t typically disappear—they linger. As he investigates, he uncovers a web of supernatural intrigue involving demonic forces, a secret society, and a growing war between the living and the dead. Along the way, Castor must navigate dangerous encounters with demons, spirits, and old enemies while dealing with personal conflicts, including his complicated relationship with his demon-possessed friend, Rafi. As he digs deeper, he realizes that powerful forces are manipulating events behind the scenes, making it clear that the case is far more than just a missing ghost—it’s part of a larger, sinister plan. With his characteristic wit, stubbornness, and skill in the supernatural, Castor must find a way to solve the mystery before he becomes another casualty in the battle between heaven, hell, and everything in between.