Here are the covers of the two books by Ben Carlin, 'Half-Safe Across the Atlantic by Jeep" published in 1955, and "The Other Half of Half-Safe" published by the Guildford Grammar School Foundation Inc. in 1989. (ISBN 0 9598731 1 2)
I have 3 copies of Half-Safe, one for each of my sons and a signed one for me.
Regards Rick