The Complete John Silence Stories by Algernon Blackwood
Trade paperback format. Recommended!
From a master storyteller of supernatural tales come 6 horror stories that launched the career of "psychic doctor" John Silence: "A Psychical Invasion," "Ancient Sorceries," "Secret Worship," "The Nemesis of Fire," "The Camp of God," and "A Victim of Higher Space." Edited and with an introduction by occult fiction authority S. T. Joshi.