If you loved how Rivers of London seamlessly weaves together a gritty police procedural with magical happenings in contemporary London, you'll be right at home in Midnight Riot by Ben Aaronovitch. Follow Peter Grant as he investigates crimes that blur the line between the mundane and the magical, navigating both the criminal underworld and a hidden world of river gods, ghosts, and ancient magic. The urban setting plus the unique magical system will capture your imagination all over again.

If Peter Grant's dry wit and the clever, often laugh-out-loud dialogue in Rivers of London kept you turning the pages, Storm Front by Jim Butcher will be a delight. Meet Harry Dresden, Chicago's only professional wizard detective, whose sarcastic banter and comic mishaps make for an addictive, entertaining ride through magical crime-solving.

If the immersive worldbuilding and the hidden layers of magical London in Rivers of London fascinated you, Neverwhere by Neil Gaiman is a must-read. Journey with Richard Mayhew into London Below, a mysterious, vividly realized underground world full of strange inhabitants and ancient secrets lurking just out of sight from everyday life.

If you were intrigued by Peter Grant's sometimes ambiguous choices as he balances law enforcement with the often murky ethics of the supernatural, The Rook offers a similarly nuanced protagonist. Myfanwy Thomas wakes up with no memory and must navigate a shadowy government agency protecting Britain from supernatural threats—often making tough, ethically gray decisions along the way.

If you raced through Rivers of London for its brisk pacing and gripping magical whodunnit, Magic for Liars by Sarah Gailey will keep you hooked. Follow Ivy Gamble, a non-magical private investigator, as she delves into a murder at a hidden school for mages, blending the urgency of a crime thriller with spellbinding secrets.