This book wasn't nearly as successful as British children's book illustrator
Brian Wildsmith's highly-lauded abcedary
ABC, which remains in print today. This book was published one year later (1963 in the U.K., 1965 in the U.S.) and is widely available on Amazon or eBay, and I think it was just a little too abstract for the audience he won over with
ABC's lovely figurative drawings.
Still, I kind of love this book. I really like Wildsmith's earnest explanation of why the book is set up the way it is: