its very cool that, in the touhou music CDs, ZUN makes music to accompany his writings and I think it would be pretty fun to do something like that if I knew more about music, he usually writes very energetic music because of the nature of his games but the music CDs allow him to explore other feelings, often lending themselves to a dreamlike feel due to the nature of the stories
another artist that does something like this is Opeth, in their album My Arms Your Hearse, most of the songs have singing or death growling but a few have no lyrics, and even those songs are listed in the album as having lyrics; if I remember correctly, the lyrics are all written on one page, just running into each other, the name of each song being in caps, and being the final word(s) of the previous song (with the last looping to the first).
anyone know other artists/writers who do this sort of thing?