Author of hundreds of articles on gambling, his weekly book reviews appear in numerous publications throughout the gaming industry. Once you've seen what everyone else has said, see if what you've produced is any different or any more valid in its conclusions.
People like to be educated, entertained perhaps even titillated.
I told everyone to read my book. It's a question worth asking of anyone hustling a book to you especially if it's by mail. Okay, I'm belaboring the point. Write the book, but be logical. Maybe you want to establish yourself as a consultant or expert on a game or some aspect of gambling.