The Bacterionomicon is a compendium of infectious bacteria and antibiotics presented in the style of an RPG bestiary book! Why? Because DRAGONS. And because imagination, metaphor, and stories aid learning and can promote awareness about antibiotic misuse. The book contains entries for 46 "Lords of Pestilence" from Acinetobacter baumannii to Yersinia pestis, and 30 "Apothecary Warriors" from Amoxicillin/Clavulanate to Vancomycin. Each entry includes an elaborate high fantasy illustration, descriptions of tribal groupings, fighting styles, and nemeses, and an article about its role in ongoing battles in the world of Soma. Embedded into the descriptions are medical metaphors that convey mechanisms of action, modes of transmission, parts of the body that get attacked, special traits, and progressions of disease.