The hidden staircase, by Carolyn Keene 77602 [Author: Carolyn Keene] [Illustrator: Russell H. Tandy] [Link: https://www.gutenberg.org/ebooks/77602] note: link will be active within two hours of posting. Thanks to Alex White, Greg Weeks, Mary Meehan & the online Distributed Proofreaders Canada team at https://www.pgdpcanada.net. This file was produced from images generously made available by Internet Archive/India. Regards, Al