The cover from George W. Brown. Building The Canadian Nation. J.M. Dent & Sons (Canada) Ltd., 1942, Revised & Reprinted 1950, Reprinted 1951.
"Authorized for use in the Schools of Ontario, New Brunswick, and Saskatchewan. Authorized by The Protestant Committee of The Council of Education for the Province of Quebec."
This was the grade 10 Canadian history text in Ontario and several other provinces for over 20 years and went through numerous editions, selling over 600,000 copies.
With cover illustrations like this, who wouldn't be tempted to crack it open?
Below, the frontispiece: