For many years birders have had many comprehensive world checklists in which to keep their life lists. Now listers have a wonderful reference to keep their world mammal lists. Following the same format of many of the birding references like Clements and Sibley & Monroe, Duff gives the common and scientific name followed by a brief description of habitat and range. Ample space is given for writing down date and location of sightings. An invaluable resource for those who keep mammal lists -- your list is going to be a lot easier to manage with this book.