The Castle in the Attic

From Author Wars - https://authorwars.com/publications/the-castle-in-the-attic-36808.html

Overview:

Title: The Castle in the Attic
Author: Elizabeth Winthrop
Year: 1986
ISBN-10: 0553154338
Publisher: Bantam Skylark
Price: $2.75
Pages: 179
Binding: Paperback
Type: Novel
Title Reference: The Castle in the Attic
Notes:
Some data from Amazon UK as of 2016-05-10 -- "Paperback"; 19 cm -- no page-count or list price, nor cover or interior art credit -- cover image probably shows "in US $2.95 (in Canada $3.50)