The book which Rafael is compiling must logically be some kind of compilation, by definition. This leaves us with a few options. One: the book is a compilation of poems by one author, or perhaps by different authors around a unifying theme. Two: the book is a compilation of essays around a common theme. Three: the book is a compendium of short stories of either the same genre, or by the same author. There are innumerable subjects, really.
