Most of the book is a survey of what other people have said and written about robot rights. Each argument is looked at, scrutinized for problems, and held up against the others. Gunkel is a solid philosopher and does a great job of using terminology consistently, spotting errors of reasoning, and pointing out the strengths and weakness of each position.
In the final chapter he presents his own approach for considering robot rights based on Levinas’s ethics of “the other” more broadly applied. This final chapter gets a little heady, but the rest of the book is very easy to follow even if you’re doing something else while listening.
The book is more about deconstructing our preconceived notions of morality and human rights than it is about robots.
Stifel’s reading if the text is good.