This album was inspired by the manga "The Kurosagi Corpse Delivery Service" (first volume) by Eiji Otsuka and Housui Yamazaki. The English language version produced by Dark Horse Comics.
In the back of this volume is a glossary written by the editor with translations / interpretations of all the kana that feature in the manga, along with a short introduction for those that are unaware of what kana are. They are essentially written sounds that are used as sound effects / FX in certain panels of the manga.
Featured as track titles are just a small selection of the kana that I enjoyed the most whilst reading, or that related heavily to a passage that I enjoyed the most relative to the rest of the manga. They span across all four episodal chapters of this first volume, which is the only volume I have read so far.