Disclosure: I received a free e-copy of this book from the editor for the purposes of writing an interview with them. Reviewing the book wasn't explicitly a part of that agreement, but I'm doing it now just because I like the book a lot and feel like doing so.
For people who are relatively new to the topic of adult autism - for adults who were just diagnosed, say, or who are considering diagnosis or self-diagnosing, or for the family and friends who want to understand them better - this book is an incredibly valuable resource. I can't recommend it highly enough. It shares basic information and personal experiences on topics ranging from family dynamics to burnout to accommodations at work to dealing with doctors in a well-written, compelling, and accessible way. There is also a list of resources for further reading at the end.
For people who have been in the autism self-advocacy community for a long time, there will be a lot in the book that rehashes topics they already know about. I would still recommend the book to those people anyway - it's useful to have all the information in one place, as a resource that you can refer people to or even physically hand to them. And even for an experienced person some of the essays may have new perspectives, particularly Morénike Giwa Onaiwu and Samantha Hack's contrasting pieces on their intersectional experience, and Andi C. Buchanan's nuanced essay on autistic relationships to technology.