The story centres more on his daughter Enid and his old friend Edward Malone. Another friend from the 1912 novel The Lost World, Lord John Roxton, is also involved in the novel's second half. Professor Summerlee, who has died of old age around this time, is referred to by the mediums. Heavily influenced by Doyle's growing belief in Spiritualism after the death of his son, brother, and two nephews in World War I, the book focuses on Edward Malone's at first professional, and later personal interest in Spiritualism.
Sir Arthur Conan Doyle (UK 1859-1930) Escritor y médico nacido en Escocia, principalmente conocido por haber creado al famosísimo personaje Sherlock Holmes, el detective más conocido de todos los tiempos, versionado para TV y cine de forma cíclica. Otra gran serie de novelas confeccionadas por Doyle fueron las protagonizadas por el profesor Challenger (El Mundo Perdido), también trasladadas a la ficción audiovisual.
