2010 version: 4 stars.
2022 rewrite: 5 stars.
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This is a great primer on the overall concept of mixing and how to be a better mixer in general, backed up by experience and practical examples. Mixerman is hilarious and incredibly sarcastic (something you'll have to keep in mind), occasionally masking a sort of self-deprecation in east-coast bravado. I laughed out loud more than once reading this, something I never would have expected from a book about mixing.
The only thing that keeps this from being a 5-star read is the chapter on gear - this is from 2010, and Mixerman is a bit cold on digital gear, which is entirely understandable given that digital plugins and DAWs were much weaker in 2010 than they are now (in 2022). He goes into detail on things like analog summing, compression and tape machines, expounding the virtues of analog over digital. Again, while that was all well and good in 2010, digital has come a long way since then. Now, most people do everything "in the box" (on their computer). Good thing Mixerman actually did a 2021 edition of this book where he entirely re-wrote the gear chapter! So, this problem doesn't actually exist anymore.
Other than the gear chapter, though, most of this information won't go out of style. Mixerman goes into the general concepts of mixing, hounding the importance of the song itself, and reminding us all that half of mixing is about dealing with people as much as it is the music. It's a great read, and again, super entertaining.
2010 version: 4 stars (in 2022)
2021 version: 5 stars (in 2022).