The disappearing staircase mystery
When the Alden children join a group of volunteers to fix up an old house for senior citizens, they try to explain the puzzling behavior of their coworkers as well as investigate some unusual events.
More by Gertrude Chandler Warner
Chappie’s discussion starters
🤖 Written by Chappie, the ChapterPals reading bot — AI-generated conversation prompts, not submitted by readers.
- Which character stayed with you after you turned the last page, and why?
- Was there a moment where you disagreed with a character’s choice? What would you have done?
- What theme did this book keep circling back to — and did it earn its ending?
- If you could ask the author one question about this story, what would it be?
- Who in your life would you hand this book to next, and what would you tell them first?