The House on the Borderland (Version 2) - William Hope Hodgson

This story helped propel 19th Century gothic fiction in the direction of “cosmic” horror. In fact, H.P. Lovecraft lists it as among his greatest influences. It begins simply enough: with two friends stumbling upon a ruined and curious house while vacationing in a remote village. After reading the tattered journal of the old recluse who lived there, they are shocked to discover an interdimensional, reality-bending nightmare full of nearly-indescribable horrors that range from demons, to bestial (somewhat Lovecraftian) monsters, and devastating parasitic fungal diseases. - Summary by jvanstan