H. P. Lovecraft 
Call of Cthulhu [PDF ebook] 

In one of his most acclaimed short stories, horror genius H.P. Lovecraft unspools an eerie tale about an ancient cult-like religious practice that has persisted in rural backwaters and isolated communities up through the twentieth century. Stringing together a number of isolated incidents that occurred across America and around the world, the tale concludes with a terrifying encounter with what may be the fearsome beast at the center of the cult.