Retro Gamer #114 has a 6-page feature on Punch-Out!! that is worth checking out.
A while back I sent links to the digital copy of the book to Retro Gamer to see if they wanted to write about it. I never heard back, but it appears to have contributed quite a bit to this article — especially considering there is nothing not already covered in my book.
Go pick up a copy and support this great magazine!