House of Stairs
By William Sleator
1974’s House of Stairs is a standalone young adult novel by William Sleator.
In a not-too-distant future, five children — timid Peter, unruly Lola, confident Oliver, accommodating Abigail, and cunning Blossom — are consigned by the authorities to the House of Stairs. Although they have very different backgrounds and personalities, all five of them share one characteristic: they are all wards of the state.
Make that two things: Nobody will ever miss any of them.