Despite being too brief to offer a good understanding of any of the many approaches on offer, it still seems arduously drawn-out and unforthcoming. This has less to do with the elusive and sometimes unsatisfying nature of philosophy, and more to do with Thompson's willful disinclination to take a stand on anything meaningful. Her insistence on misrepresenting even the most basic of scientific principles (especially evolution, which is depicted as a directed process trying to achieve human sentience, a nauseatingly incorrect notion) is frustrating throughout, and scuppers whatever paltry arguments she does try to make. Overall the book is quite evidently commissioned by hacks who seem to have instructed the hapless Thompson to be both comprehensive and brief, such that it was not possible for her to achieve either.
If you want a very boring, classroom overview of philosophy, read this book. If you want to know what people doing philosophy actually think, read anything else.