The Song:In order to make
Song Reader feel more authentic, Beck filled it up with fragments of melodies and songs, as well as fictional album collections and made-up song titles. "My Debut In Timbuktu" is listed as part of a collection of "far-flung melodies" about various exotic locations.
Most of the song titles sprinkled through the book are references to older songs/sheet music, but the "far-flung melodies" titles are mostly just jokes/puns about various locations... and best I can tell "My Debut In Timbuktu" is just that.