As is often the case with books having to do with evolution and evolutionary psychology, there are lots of people who think this book is great and a few who think it's horrible.
Luckily for you, somebody uploaded the audiotape of the book, or at least part of it, onto YouTube as a series of 39 videos (of which the only content is the audio). That may well be a copyright violation, so it may not be there for long, but you can check out the book for yourself by searching for "How the Mind Works by Steven Pinker [1/39]".
Of course, different readers are looking for different things, and different readers mean different things when they give the same rating to a book. But it's difficult for me to understand how anyone could give this book a 1- or 2-star rating unless 1) they lacked the interest or intellectual chops to understand it, 2) they have some discomfort with evolution, or 3) (thinking of one reviewer in particular) they have a bad case of envy that Pinker has achieved so much more acclaim with his work.
Anyway, you can decide for yourself with the videos whether it is worth reading.