Sorry, thought my comment was glaringly tongue-in-cheek. The publisher has located some extremely esteemed folks to evaluate and frankly it's gotten me even more self-conscious about what I've written.
I have been unable to locate another book on this subject (its implementation in Go, anyway), but there are scores of experts in Go, many of whom are far more qualified than I am. I would respect their opinions on the book itself.
This was challenging primarily because it's so idiomatic and easy to handle in Go, so a good deal of the book talks about pitfalls, testing and implementation.
I have been unable to locate another book on this subject (its implementation in Go, anyway), but there are scores of experts in Go, many of whom are far more qualified than I am. I would respect their opinions on the book itself.