"The Bells" is a heavily onomatopoeic poem by Edgar Allan Poe which was not published until after his death in 1849. It is perhaps best known for the diacopic use of the word "bells." The poem has four parts to it; each part becomes darker and darker as the poem progresses from "the jingling and the tinkling" of the bells in part 1 to the "moaning and the groaning" of the bells in part 4. Cover by: @CaffeinatedKiwi

A Study in Scarlet is a 1887 detective novel by British author Arthur Conan Doyle. Written in 1886, the story marks the first appearance of Sherlock Holmes and Dr. Watson, who would become two of the most famous characters in popular fiction. The book's title derives from a speech given by Holmes, an amateur detective, to his friend and chronicler Watson on the nature of his work, in which he describes the story's murder investigation as his "study in scarlet": "There's the scarlet thread of murder running through the colourless skein of life, and our duty is to unravel it, and isolate it, and expose every inch of it." Cover by the wonderful @-capetown