This is an excellent point of entry if you are not familiar with research in the area of fat studies. The essays cover a great breadth of topics relevant to many traditional academic disciplines (medicine, public health, history, rhetoric, political science/sociology/anthropology, literature, etc). Although the chapters are brief, they provide citations to previous work that you can easily track down if you want to explore any particular topic in greater depth. Some of the essays serve primarily as literature reviews, while others seek to make research contributions of their own. Methodologically, the essays either used or cited research involving a wide range of methods from medical/health science, social science (qualitative, quantitative, and experimental), and the humanities (Foucaultian analysis, queer theory, feminist theory, critical race theory, critiques of neoliberalism, etc.). I am particularly interested in the topics of bodies and imagination, both of which were themes of several of the essays (although I was not terribly impressed with the section on fat embodiment). Overall, this volume falls squarely into the tradition of socially conscious academic research that performs both a scholarly and activist function.
As some have mentioned, this is a primarily an academic volume, although there are also several chapters written by activists and other practitioners (e.g. people in the fat burlesque and fat exercise movements). While it is clear to me that most of the authors have a serious attempt to write in a relatively accessible fashion, the primary audience is academic researchers. If this is not what you're looking for, you may want to look at some of the popular books on this topic (based on the introduction, I think Marilyn Wann's *Fat!So* book might be a good choice, and based on her blog, Kate Harding's book Lessons from the Fat-o-Sphere* might also be a good choice). I would say that Deb Burgard's essay on Heath At Any Size is very important reading for everyone, especially for healthcare providers and fat people who wish to advocate for themselves in medical contexts, even though it is written in social scientific language (although I don't think it's too difficult to follow).
As in all volumes like this, the essays vary in quality. Overall, I thought the essays were strong, but the last two sections were notably weaker. If the dearth of quality academic work on embodiment and fat politics in this volue is representative of the field of fat studies as a whole, this suggests to me that this is an area that political theorists and even political scientists, as well as people who study bodies in the humanities, need to contribute to.