While I have only read a handful of books and papers on the topic, I found this to be the most accessible and fun resource among them. As with all the "For Dummies" books, the organization flows easily from one topic to the next, making the book as useful for someone looking for a specific or even random tidbit on the topic, or one looking for a more comprehensive summation of the disease, its treatment, and its outcomes. It covers the basics (symptoms, theories on causes, what it is, comparisons to normal reproductive functioning versus what happens with endo, etc.), and also covers different treatments (mainstream, surgical, drug, and alternative) and what to look for in a doctor. It also helps patients think of what to discuss with the doctor and which questions to ask, which is great, since diagnosis is often delayed 8-15+ years.
While it may not go incredibly in depth on any one aspect of endometriosis or get too deep into the scientific nitty gritty, it gives the reader a wide enough breadth of knowledge to lay the groundwork for further research into serious medical texts and studies. It was, of course, detailed enough for most people and didn't leave me with any unanswered questions. On it's own, it also serves the purpose of educating oneself on the disease and finding ways to approach it and deal with it. This was a fantastic book to read, and I recommend it for both personal and academic research.