In addition to profiles of individual killers, the titles address forensic advances, psychology, FBI profiling, and the historical development of the serial‑killer phenomenon.
Authors use a variety of approaches, including journalistic profiles, criminological and psychological analysis, historical or academic overviews, compilations of firsthand testimony, and creative/novelty formats such as a coloring book.
The listed dimensions range roughly from 7.8 to 11.0 inches in height, 5.0 to 8.5 inches in width, and 0.17 to 0.9 inches in depth across the titles.