Three books. Three warnings.
I don't read much fiction, but this one caught my eye. Written by a well-studied classicist, Jo Walton, it's a sci-fi journey into the past, bringing together famous thinkers from different eras:
Thessaly: The Complete Trilogy (The Just City, The Philosopher Kings, Necessity) . [ Taste is subjective; your mileage may vary.]
Great recommends ... tossing one back to you ... the category might be called "Mischievous Science-Fiction"; title (there are two because, translated from Japanese, by different publishers, or, perhaps different editions - but same book): "What the Maid Saw" and/or "Portrait of Eight Families". By Yasutaka Tsutsui; thanks ...