Trella is a scrub, responsible (like the thousands of other scrubs inside) for keeping things clean, right down to the air and waste ducts. Trella is also a bit of an explorer, and has earned a reputation as Queen of the Pipes, able to travel through the levels and observe in places she has no business being. Her best friend, Cogon, introduces her to a new prophet, Broken Man, who enlists her help in retrieving information discs he'd left in a vent over his quarters, before he'd been sent down to the scrubs. Discs that prove the existence of a gateway--a doorway to Outside. Trella is skeptical, but curiosity gets the better of her and she searches out the discs in a move that will launch her into an adventure she never could have anticipated. 
 Dystopian insofar as one family (out of 9) has taken over power Inside. Readalikes: Incarceron, Ender's Game, maybe Across the Universe? 
 This scattershot review brought to you by It's Late and I'm Tired.