The Feasts of Tre-mang is a fictional cookbook. That is, it contains recipes that you can actually cook, but they claim to be a variety of holiday dishes from an obscure Atlantic island called Tre-mang that was destroyed by volcanic eruption in 1914.
As you might expect in a cookbook, there are lists of ingredients, methods, and measurements; there are pictures of finished dishes, and editorial notes about safe substitutions. There are also explanatory articles about Tre-mang history and culture, the contexts in which these foods would be presented, and the life of Theodora Peterson, an anthropologist’s daughter whose diaries are the chief source of surviving information about Tremanner cuisine. Brown intersperses these with “old” photographs, maps, portraits, the Tre-mang flag and currency, and even Tre-mang-style erotic postcards. (It seems that Tremanners were very much aroused by ears.) It is narrative-of-objects stuff, though supported by lots of straight written text as well as well.