One of the delights (and horrors) of working in publishing, as I did from the early 60’s to the late 70’s, is that your work comes back to haunt you. With Abbe Books now being the main worldwide source for collectors, they are able to get 1st editions complete with the original dust jackets.
This one turned up over the weekend. I designed it in 1964 when I was just 21, for publishers Hodder & Stoughton. The main typeface used is Schmalfette Grotesk, which I cut out from copies of the trendy magazine of the time, Twen. More about that here