August Derleth (1909-1971) was an American writer and anthologist, best known for his pioneering work in the genres of horror, science fiction, and regional literature. Born in Sauk City, Wisconsin, Derleth's early fascination with the supernatural and the macabre led him to correspond with H.P. Lovecraft, eventually becoming one of Lovecraft's most ardent disciples and the chief architect of the Cthulhu Mythos after Lovecraft's death.Derleth co-founded Arkham House in 1939 with Donald Wandrei, a publishing house dedicated to preserving and promoting Lovecraft's work, which played a crucial role in cementing Lovecraft's legacy and influencing a generation of horror writers. Beyond his contributions to horror, Derleth was a prolific author of regional literature, capturing the essence of Midwestern life in his Sac Prairie Saga, a series of novels and short stories that depicted the rhythms and nuances of small-town America.Controversially, Derleth's expansions of the Cthulhu Mythos have been both lauded and criticized. Some purists argue that his Christianized dualism and structured mythological approach diverged from Lovecraft's original cosmic horror. Despite this, Derleth's role in popularizing and expanding the Mythos cannot be overstated.Derleth's influence extends to contemporary writers like Stephen King and Neil Gaiman, who have acknowledged his impact on their work. His dedication to preserving and expanding the realms of speculative fiction and his vivid portrayals of American life make him a significant figure in 20th-century literature.