Stories in which a person-sized maze figures in prominently:
In The Freedom Maze, a hedge maze is hugely important to the storyline. But I don't want to give it all away, so just trust me: HUGELY. IMPORTANT.
In Incarceron, Finn lives in the titular prison... which is, basically, a huge, possibly-sentient maze.
In The Thief, Gen has to traverse a deadly underground maze in order to steal Hamiathes's Gift.
In The Maze Runner, Thomas wakes up in the Glade—which is in the middle of a ginormous maze—with no memory of his recent past. It isn't long before he becomes a Runner, tasked with exploring the maze in an attempt to find a way out.
I have a couple of other titles in mind—like Lost in the Labyrinth and The Perilous Gard—but I want to re-read them first.
Additions and/or suggestions?