Picked up this novella, or more like a single short story, in the Steven Sterk bookstore in Utrecht. A 2024 English translation from the original 1972 in Spanish, by Argentinian author Ángel Bonomini (1929-1994).
Unambitious and detached legal scholar is invited to a Swiss university for a summer, along with 23 others that turn out to be full Doppelgängers. Enjoyable, quick read.