In a fair few of Borges' works, imaginary books play some important role. I was intrigued especially by his reviews of imaginary books. Borges himself has said

In a fair few of Borges' works, imaginary books play some important role. I was intrigued especially by his reviews of imaginary books. Borges himself has said this on the matter: "It is a laborious madness and an impoverishing one, the madness of composing vast books, setting out in five hundred pages an idea that can be perfectly related orally in five minutes. The better way to go about it is to pretend that those books already exist, and offer a summary, a commentary on them." [1] Since I couldn't help but agree with this sentiment, I have gone and searched for other authors who did similarly. The book that stands out is Stanisław Lem's A Perfect Vacuum, which is actually a collection of reviews of imaginary books. Lem was primarily a Sci-Fi author, but many of these have a philosophical undertone. My favorites are Die Kultur als Fehler and Non Serviam. [1] Introduction to The Garden of Forking Paths (1941)