The Hubbles' Treasure Hunt

From Author Wars - https://authorwars.com/publications/the-hubbles-treasure-hunt-587560.html

Overview:

Title: The Hubbles' Treasure Hunt
Author: Elaine Horseman
Year: 1965
Publisher: Chatto & Windus
Pages: 174
Binding: Hardcover
Type: Novel
Title Reference: The Hubbles' Treasure Hunt
Notes: 1st ed.

Cover image from Amazon UK as of 2016-10-02, which states all of "Hardcover – Illustrated, 1 Jan 1965", ISBN: 1127438190, {{ASIN|B0000CMSLE}} Meanwhile {{ASIN|B01LBNL698}} states " Paperback – 1965"