The floor has a memory-and now it has a plan. Arby Riswell is a world-class installer with a secret: the seams he lays don't just hold carpet and coatings together. They tie into a hidden corridor of power running under airports, hospitals, stadiums, hotels-and now entire cities. After the events of Under Every Step and Hidden Network, Arby finally understands what he's really building. "Smart" floors and experience systems are being wired together into a global nervous system that can gently guide crowds... or quietly weaponize exits when nobody's watching. In Seams of Power - Book 3: Anchored Ground, Arby turns his craft back on the people who tried to use it:Locking down a medic spine in a private hospital so panic can't be steered into dead ends. Rewriting a stadium ramp so it refuses to become a choke point, no matter what the software wants. Turning a lab's glossy demo floor into his own listening post, capturing every trick before it reaches the real world. And building a "corridor council" of ops chiefs, stewards, and gate managers who can say no when the dashboards say yes. As the network comes into focus, one node keeps pulsing on the map: the Arco Complex in Lisbon, home of the quiet watcher who has been pushing on Arby's jobs from the other side of the world. Before Arby can ever stand on that slab, he has to prove his own city can stand without him. Anchored Ground is an urban fantasy thriller about hidden systems, blue-collar genius, and the people who keep the world from tripping over its own "smart" floors. It's the third book in the Seams of Power saga-and the last step before Arby takes the fight onto the watcher's home ground.