For the first time, you can view all the world's mammals together in a single, easy-to-use, and fully illustrated volume. Created for a broad audience, from wildlife enthusiasts to expert mammalogists, researchers, conservationists, and anyone interested in the spectacular diversity of mammals, this book has something for everyone. It features 6,581 species in total, including 6,459 extant wild species, 19 domestic species, and 103 extinct species. 7,349 illustrations cover all species, as well as sexual dimorphism, morphs, and some distinctive subspecies. Relevant measurements of length and mass are provided where available, as well as additional data for groups where important. 6,459 distribution maps are included, with written summaries and notes on altitudinal ranges. The 2,834 single-country endemic species are clearly marked. Common species names are provided in English, French, German, and Spanish, as well as scientific names. For each species, the IUCN Red List extinction risk category is indicated to highlight the importance of its study and conservation. A taxonomic summary of the number of subspecies for each taxon is provided. An appendix details all taxonomic changes since the publication of the Illustrated Checklist of the Mammals of the World up to 2023, including 107 newly described species and 106 species that have been split, explaining the most significant cases. More than 100 species known to have become extinct since 1500 are presented separately with texts and distribution maps in their own appendix. A summary of recognized domesticated species is included in a separate appendix. A 37-page world atlas of color reference maps provides relevant details of interest to both amateur and professional mammal enthusiasts. The easiest and most enjoyable way to navigate all the world's mammals. All the Mammals of the World has two clear predecessors, with which it shares many of its objectives, especially that of disseminating and promoting interest in mammals and wildlife worldwide: the 9-volume Handbook of the Mammals of the World, the first printed work to include all the world's mammals; and the two-volume Illustrated Checklist of the Mammals of the World, which offers a taxonomic revision of the earlier publication. All the Mammals of the World aims to bring the extraordinary richness and diversity of the world's mammals to a wider audience. There are several differences between All the Mammals of the World and the two-volume Illustrated Checklist of the Mammals of the World. One obvious difference is that All the Mammals of the World is a single volume, and its price is much lower than that of the checklist. We hope it will be more accessible to many more people for whom the checklist was perhaps too technical and not as affordable. In short, for the first time,It is now possible to access all the world's mammal species in a single, easy-to-use, illustrated volume, at a significantly lower price than even a single volume of other works on the world's mammals. We hope this new book will reach a wide audience, sparking and increasing their interest in mammals and wildlife, and that for many it will be a first step towards a passion for nature, biodiversity, and the conservation of our planet.