In the process of writing my new collection of essays, Ultrasonic, I did an internet search for "sound as punishment," and came across a story about the use of music to torture detainees in Guantanamo, Abu Ghraib, and other US detention facilities. The story had the effect of shifting my understanding of the world in strange ways. It included a "top ten" list of bands and songs, and I was disheartened but not terribly surprised to find many of my favorite bands and songs on that list. Around that same time, I'd written a Book Notes playlist for Largehearted Boy on my last book, The Day After The Day After: My Atomic Angst. I again discovered that many of the songs/bands on that Book Notes playlist were also on the list of torture songs that I'd scribbled down. I've since been unable to find the original article, but a quick online search will take you to several stories and lists of the most used torture songs. What resulted through all of this back-and-forth is the final essay in the book, "Playlist for Finishing a Book," which is a revised (or reconsidered) version of my original Book Notes piece; and what I've done here is repackage and rearrange some excerpts of that essay with new songs and some new material to create a different Book Notes playlist for Ultrasonic.