CK field: author's soundtrack

I just finished reading a book, and in the author's appended acknowledgments there was a short "soundtrack" of commercially-available music, presumably that he had listened to when writing and/or for readers to listen to when reading it. It strikes me that I have seen this sort of info offered for other books too, and while hardly available or relevant for all books, it would be an interesting and useful CK datum for many.

My Other Reader notes that Stephen King uses song lyrics for epigrams in a related phenomenon, affecting her reading of the book by cuing imagined soundtracks.