Download or read book The Disappearing Staircase Mystery written by Gertrude Chandler Warner and published by Random House Books for Young Readers. This book was released on 2001-01-01 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Boxcar Children are helping the Heart and Hands group fix up the old Bugbee Mansion. The Aldens begin to explore the mansion, discovering hidden rooms and odd noises coming from the walls. Most intriguing is a secret staircase, leading to a room that no one knows about—no one except the thief!