The D&D supplement Volo's Guide to Monsters and another book stacked under a plank of wood. The stack rests on carpet, next to an electrical cord. A blanket is just visible in the corner of the photo, hanging from the framework that is out of the photo.

We have found the best use for 5e rulebooks: Putting them under the bases of our DIY acoustic panels. #diymusicians #mathcore #denvermusic #diyrecording #ebonydarknessband