H. P. Lovecraft (2014). “Complete Collection Of H. P. Lovecraft - 150 eBooks With 100+ Audiobooks (Complete Collection Of Lovecraft's Fiction, Juvenilia, Poems, Essays And Collaborations)”, p.11, Ageless Reads
H.P. Lovecraft, Digital Papyrus (2014). “H.P. Lovecraft: The Ultimate Collection (160 Works Including Early Writings, Fiction, Collaborations, Poetry, Essays & Bonus Audiobook Links)”, eBookIt.com
Arthur Conan Doyle (2016). “Sherlock Holmes - The Novels: A Study in Scarlet, The Sign of the Four, The Hound of the Baskervilles, The Valley of Fear”, p.30, BoD - Books on Demand
H. P. Lovecraft (2016). “H. P. LOVECRAFT äóñ The Ultimate Horror Collection: 60 Occult & Supernatural Mysteries in One Volume: The Greatest Spine-Chilling and Blood-Curdling Stories of Terror & Macabre: The Call of Cthulhu, The White Ship, The Dunwich Horror, At The Mountains Of Madness, The Whisperer in Darknessäó_”, p.274, e-artnow