The concept refers to a small, often pocket-sized, publication focused on subjects relating to mortality. These works typically explore death, dying, grief, and related philosophical or practical considerations. An example might include a handbook offering solace, guidance, or contemplation on the end of life.
The importance of such a resource lies in its ability to demystify a universally experienced, yet often avoided, topic. The benefits can include reduced anxiety surrounding death, improved coping mechanisms for bereavement, and a greater appreciation for life itself. Historically, similar types of literature served as spiritual guides or memorial artifacts.