1) Place one book on the left and the other book on the right of your preferred writing area (pad of paper, screen, typewriter).
2) Without looking, flip to a random page in the reference book. You can either write down the line verbatim or play with it until it makes sense
3) Repeat step 2 with the fiction book.
4) write a unique line relating to your lines from steps 2 and 3
4) Alternate between steps 2, 3, 4
5) Once you have your lyrics written out, pick up a musical instrument and turn your words into a song.
One common worry is that this work isn’t really written by you because of how this is all by chance it is. Ryan Adams explains The reason that “Stacks” works, I believe, if you can teach yourself to write this way—is like Mad Libs—the ego will always come out to play if you can get the id to tell it to. [. . .] it will force me to fill in the blanks. Meaning that even though these might not seem about you, your brain wants to put you at the center of its experiences. Even though his song starts out as nonsense he concedes “[this song] instantly reminds me of somebody I know”. “Stacks” is a great way to start a song and test the limits of your imagination.