@DavidW They are completely shut down for my purposes. I can't reserve books and pick them up. Technically in the university library maybe I could, it's a bit unclear, but definitely not in other libraries. Not that if they reopened it would help too much with Hal Clement, I think I searched in the catalog and his books aren't much available anyway.
For Hal Clement, I may have to look in used book stores, which are open, but I don't know if there are even translations.
Ok, it looks like at least a few books of Hal Clement will be available in libraries. A translation of one called Star light, an original called Close to critical published by Gollancz (1966) – these are the few foreign books that get to libraries only from donations, usually from the collections of dead people, and that one big donation from the British Council library when they removed presence of their organization in Hungary.
To clarify, I have already read Mission of gravity.
Star light is apparently a later sequel about Mesklin, I hope it would be understandible without the volumes before it.
And one more: translation of Blot, which I understand isn't about Mesklin.
Apparently “Blot” is a short story, available in a mixed volume of sci-fi.
@DavidW Around the world in 80 days may be irrelevant, it's probably more well known because of a successful movie or something. But then, we do have multiple questions (not by me) about its final twist (the only Sci Fi part) on Sci Fi, so some people must have read it.
“Which are the two best-known Jules Verne titles worldwide? The two best-known titles are Twenty thousands leagues under the seas and Around the world in 80 days.”
I was wrong then, not Michel Strogoff. Why 20000 leagues under the sea? Seriously? That's one of the more boring books.
Or maybe I just irrationally dislike it.
Around the world in 80 days I can understand: it's dense with story, easy to digest for young people, doesn't have too much of the scenery descriptions that make the other Jules Verne books much more enjoyable, yet still manages to be a good book.
It's not my favorite, but I don't dislike it either.
In that case, take Michel Strogoff and Center of Earth as just my favorites.