The Archeology of Yog-Sothoth is the third and final book of the Kathu Journals Out of Lovecraft's Providence series. The most preternatural details are revealed from a forensic study of elements of the physical Kathu Journals notebooks and their construction. What emerges is the unknowable nature of Yog-Sothoth, evidenced in fractal repetition, from low-order dimensional artifacts left behind - in radio telescope transmission from the far reaches of space, in virulent and bacterial phenomena that defy nosological classification, and in the very vibrations of the atoms that gibber their waveform madness, like a trail of breadcrumbs to some fiendish witch's cabin. Beyond the final conclusions based on the evidence presented, past the malign presence of Cthulhu and Nyarlathotep, the evidence from the Necronomicon Fragment as revealed in The Kathu Journals is explored in a number of analytic techniques to the edge of horror, exposing the intrinsic nature of Yog-Sothoth in the very fabric of materialism itself.