From the back cover:
Four Friends in Peril…
Special Pyramid-Search Insert.
593 Entries - Many Sub-Adventures and Horrifying Outcomes.
Trace Numbers for Convenient Backtracking.
Location System for Free-Will Geographical Movement Between Programmed Story Tracks.
Calendrical Record-Keeping and Expenditures in a Race Against Time.
Modified, Removable Investigator Sheets.
ALONE AGAINST THE DARK is a sinister solo adventure for CALL OF CTHULHU roleplayers. Beginning with the theft of a priceless relic, four friends are drawn one by one into a dark design of mystery and terror. As first a quiet linguistics professor from Miskatonic University, you must solve the riddle of disturbing disappearances to forestall grim disasters which threaten the planet.
…Alone Against The Dark