In Rider Haggard and the Imperial Occult, Simon Magus offers the first academic monograph on the world of occult thought which lies behind and beneath the fictional writing of H. Rider Haggard. It engages with a broad scope of religious, philosophical and anthropological ideas. Many of these were involved in debates within the controversies of the Anglican Church, which occurred in the face of Darwinism, and the criticism of the Bible.

The book follows three main intellectual currents involved in the promulgation of these ideas, namely the reception of ancient Egypt, the resurgence of Romanticism and the ideas of the Theosophical Society, all couched within the context of Empire.