UPDATE: I found this article that highlights the inspiration behind the book Creeper’s Jeep. It was published in the Bridgeport Post on August 22, 1948:
The book is still available on eBay, but they aren’t cheap: https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2380057.m570.l1313&_nkw=%22creeper%27s+jeep%22&_sacat=0
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Originally published May 18, 2016: This book was listed on eBay.
“This listing is for a vintage book entitled “Creeper’s Jeep” by Hardie Gramatky. It is a cute story about a guy who owns this jeep that wants to share it with his family. They do not take to the idea at first but after a few incidents decide to give it a try. Great illustrations: see pictures. Former library copy with some of the usual markings.”