Sorting these covers by decade
Stranger in a Strange Land by decade
Robert A. Heinlein
37 covers from 38 printings with a known year, 2010s back to 1960s
2010s
5 covers · 2 of 5 printings say paperback · 4 publishers, R. Laffont and Ithaki Yayinlari among them · 2 languages
2000s
5 covers · 4 of 5 printings say paperback · 5 publishers, Artemis Yayinlari and Brand: Heyne Taschenbuch among them
1990s
7 covers · 2 of 9 printings say other · 6 publishers, Ace Books and G. P. Putnam's Sons among them · 3 languages
1980s
6 covers · 5 publishers, Ace and Berkley Books among them · 3 languages
1970s
6 covers · 2 of 6 printings say paperback · 3 publishers, New English Library and New English Library / NEL among them
1960s
8 covers · 2 of 10 printings say ebook · 6 publishers, Berkley Publishing Corporation and Ace among them
Covers from Open Library, each in the decade of the earliest printing that carries it. What the catalogues never scanned is missing here too. See the whole wall.