Mythos contains the key stories which make up the mythical world established by H.P. Lovecraft, and also contains works by Robert E. Howard written in this mythological framework. It also contains Lovecraft's essay on the the nature of the horror tale, and a new analysis written on the nature of myth and the occult in Lovecraft's work. In addition to this, Mythos also contains new tales of terror written in the same vein as Lovecraft..