What Dreams May Come in the book are derived from my wide range of reading." One of Matheson's influences was Harold W. Percival, an adherent of Theosophy, a belief system with a strong Eastern and Hindu influence. The story also shares the same theme of the ancient Greek myth Orpheus and Eurydice, in which the gifted musician makes a challenging journey to Hell to retrieve his wife. One character quotes from the writings of 18th century Christian mystic Emanuel Swedenborg. Matheson bases his descriptions of the death experience itself on studies by Elisabeth Kübler-Ross and Raymond Moody. When reading these accounts, Matheson found that
Hades (DC Comics) in final combat. As a result of the machinations of the alien god Darkseid, the Olympian gods were each split into separate entities for many years, existing as both their Greek and Roman variations. Hades' Roman counterpart, Pluto, ruled his own dimensional variant of the Underworld, occasionally coming into conflict with his "brother". The pantheons were eventually merged once more centuries later. Hades shared a sometimes tense relationship with Wonder Woman's people, the Amazons of Themyscira. The Amazons had been appointed to guard an entryway to his realm, Doom's Doorway, behind which were trapped many monsters and undead abominations. Over