I wonder if you can help me please - I hope I've come to the right place but do forgive me if I haven't.

Having read a couple of the latest editions of Agatha Christie's novels and enjoyed them very much. I'm now planning to start collecting the entire canon in the form of a vintage book collection. I'll look for these in secondhand bookshops, on Ebay and Etsy, I should think. I would rather not collect the latest editions.. but if this is the only complete set then I will consider it.

My question is -

Was there a publication series in the 1970s, 1980s, or 1990s that published the entire canon of Hercule Poirot and Miss Marple novels? An example of a 'publication series' would be the Fontana books from the mid 80's, photo attached. Unfortunately the earlier Christie novels were not included in this run of publications as far as I know.