What a great resource: an index of all the Ladybird books put out by Wills & Hepworth from the 1940s through to the 1980s – including classic series like Talkabout (721 and 734), How-it-Works (654), Learnabout (634) and of course Children’s Classics (740).
That last one saved me (and, I am sure, countless others) the effort of having to actually wade through great, fat tomes of Dickens, Verne and Dumas. Top work by the Ladybird Fly Away Home website.
Used in concert with vintage Ladybird bookseller The Arran Alexander Collection‘s site, and you will be dropping down into the nostalgia wormhole faster than it takes to flick through a 641.