Sleep No More, edited by August Derleth (Panther, 1965). From
Who Knocks? edited by August Derleth (Panther, 1965).From Ebay
oliverfranju: Lee Browne Coye: Illustration for an anthology
interplanetaryconnections: Coverart by Stephen E. Fabian for
demoniality: Cover to “The Trail of Cthulhu”, a Cthulhu-mythos