This is something very hard to find, almost by definition: a literary writer who thinks in abstract terms (the only other such author I've read is Stanislaw Lem). These are philosophical thought experiments in their purest form, yet somehow magically delivered in a playful literary athmosphere. Borges is a mathematical philosopher, first and last. Ignore the "Latin American" categorization and the nonsense about his background and personal life: one should resist embedding him in a socio-cultural framework; he is as universal as they come. It is good to read a short story once in a while to see how literature and philosophy can be saved by the parable.