Whenever I think of books that feel like the 'Artemis Fowl' series, I immediately want that same cocktail: modern magic, a clever anti-hero, and a plot that moves like a bullet train. A lot of people recommend 'Percy Jackson,' and while it's fun, the pacing sometimes gets slowed down by school-life stuff. For a relentless pace paired with intricate magical systems, I'd point you toward the 'Skulduggery Pleasant' books. Derek Landy basically took the witty banter and supernatural conspiracies of 'Artemis,' cranked them to eleven, and set them in a world where a skeleton detective fights magical crime. The chapters are short, the action scenes are frequent and cinematic, and the magic has clear, almost logical rules that get explored through the fights themselves. The humor is darker and sharper, which fits right in.
Another direction, if you're okay with a slightly older protagonist and a more urban, chaotic vibe, is the 'Bartimaeus Sequence' by Jonathan Stroud. It's got that same core dynamic of a brilliant, morally questionable human (Nathaniel) partnered with a powerful, sarcastic magical being (the djinni Bartimaeus). The footnotes from Bartimaeus provide hilarious commentary mid-action, which somehow speeds the read up instead of slowing it down. The magic here isn't just waving a wand; it's about summoning and binding entities from other planes, which leads to constant high-stakes bargaining and explosive consequences. The first book, 'The Amulet of Samarkand,' throws you into a political assassination plot within the first few chapters, and it rarely lets you breathe. The magic feels dangerous and costly, which adds a layer of tension Artemis's tech-based schemes also had.
For something that blends magic with heist mechanics even more directly, 'The Lies of Locke Lamora' is worth a look, though it's strictly fantasy without a modern setting. The con-artist protagonists planning elaborate, clockwork schemes under extreme pressure gave me strong Artemis-in-Anchorage-vibes. You get the fast pace from the constant risk of their plans unraveling and the brutal fallout when they do. The magic is more of a background, oppressive force, similar to the fairies being a hidden society in 'Artemis,' which keeps the human-level cleverness at the forefront.