A book by Polish author Stanis{\l}aw Lem. A collection of reviews of (mostly) fictional books, A Perfect Vacuum satirises and parodies everything from the noveau roman to pornography to Ulysses. Lem starts, appropriately enough, with a review of A Perfect Vacuum itself.

Has been compared (including by Lem himself, in the autoreview) to some works of Jorge Luis Borges.