House of Stairs

From Author Wars - https://authorwars.com/publications/house-of-stairs-184257.html

Overview:

Title: House of Stairs
Author: William Sleator
Year: 1975
ISBN-10: 0380005077
Publisher: Avon
Price: $0.95
Pages: 157
Binding: Paperback
Type: Novel
Title Reference: House of Stairs
Notes: ISBN 0-380-00507-7 according to the copyright page, but the SBN on the spine is 380-25510 and the catalog ID on the cover is 25510. Cover art not credited and there is no identifiable signature on the cover.