It also houses an integrated audio speaker module and electronic ink display within a 3D printed steel-infused PLA spine and cover. Inspired by one of Ray Bradbury’s short stories, “YLLA” (from his science-fiction fix-up classic, The Martian Chronicles), METALLY contains the entire text of the short story—particularly a description of a Martian interacting with a book object in detail: “[Y]ou could see Mr K himself in his room, reading from a metal book with raised hieroglyphs over which he brushed his hand, as one might play a harp. And from the book, as his fingers stroked, a voice sang, a soft ancient voice, which told tales of when the sea was red steam on the shore and ancient men had carried clouds of metal insects and electric spiders into battle.”