 The book attracted international attention, and ten days later, De Roos and Stoker were contacted by Swedish fantasy fiction specialist Rickard Berghorn, who claimed that "Makt myrkranna" must be based on an earlier serialization in the Swedish newspaper "Dagen" ("The Day") under the title "Mörkrets makter" (equally meaning "Powers of Darkness"), from 10 June 1899 to 7 February 1900.In his interview with De Roos, Berghorn stated that "Mörkrets makter" was much longer than the ca.160,000 words of Stoker's English "Dracula", and - unlike "Makt myrkranna" - upheld the epistolary style known from "Dracula" throughout the novel.