House of Stairs (William Sleator)

Summary: One by one, five sixteen-year-old orphans are brought to a strange building.  It is not a prison, not a hospital; it has no walls, no ceiling, no floor.  Nothing but endless flights of stairs leading nowhere--except back to a strange red machine.  The five must learn to love the machine and let it rule their lives.  But will they let it kill their souls?  (from amazon.com)

Where can I find it?: Upper School library, Walczak building

Tags: Fiction; Juvenile works; Science fiction