Debby K. Fantz, resource scientist with the Missouri Department of Conservation, and Dr. Victoria L. Jackson, associate professor with the University of Central Oklahoma, have worked to ensure that will continue to educate, delight, and inspire with this third revised edition. These two mammalogists have over fifty years’ combined experience conducting surveys and research, leading trapping workshops, designing distribution models, identifying mammals, and teaching courses in mammalogy and wildlife conservation and management. has grown from sixty-three full species accounts in the first edition to seventy-two in this third revised edition. The editors have maintained the basic structure of the book while adding much new information, including a full account for the elk with artwork by Mark Raithel, new trapping records, revised common and scientific names, enhanced Missouri county-level distribution information, updated range maps, and a discussion of the range expansions of the American black bear and nine-banded armadillo, as well as the increase in confirmed mountain lion sightings.