DW and I are visiting for 3 weeks in September, our first international trip since fall 2019:
How the Irish Saved Civilization by Thomas Cahill is probably old news on the RS forum, but just in case. It is extremely engaging for a history book (I read a lot of them, but often it is a slog). Thank goodness for the Irish fascination with language, even way back when.
And less well known, probably, would be At Swim-Two-Birds by Flann O'Brien. This is a novel, incredibly funny, and about the most inventive work of fiction I think I've ever seen. Really really good.