If you are looking for physical papers or documents to "develop" or collect for quests, here are the most relevant items:
: In the quest "The Ritual," you must find Marcus' notes hidden behind a picture in Mataka Village to advance the story. dead-island-riptide
: You interact with Dr. Kessler in the BioSphere (Chapter 4), where he provides background on the virus mutations based on his years of research with the WHO. If you are looking for physical papers or
: Located in the Henderson Military Base west of the cinema. It is one of the 9 Secret Files required for "The Collector" or "The Hoarder" achievements. : Located in the Henderson Military Base west of the cinema
This academic paper is the primary reason the military and specialized agencies became interested in the Palanai islands. According to , found in the military base's communication building, the paper detailed: