Fragments of Fear: The Second Cthulhu Companion is a 48-page supplement which contains a variety of material including the notes of the fictional Dr. Phileus P. Sadowsky's, additional deities from the writing of author Ramsey Campbell, adventure scenarios, and more.
Guy Hail reviewed Fragments of Fear: The Second Cthulhu Companion in Space Gamer/Fantasy Gamer No. 79. Hail commented that "Chaosium has published a lightly flawed and reasonably priced supplement for the many feverish fans of Call of Cthulhu."
- Hail, Guy (August–September 1987). "Fragments of Fear". Space Gamer/Fantasy Gamer. (79): 39.