Last time I checked...
Your book was a novel and not a system, you'd be giong for a slightly different audience. On one end there are people who enjoy reading and respect a good story who may be interested in gambling a bit. On the other there are the greedy and uneducated who would love to stick it to the man by getting rich quick, they'll even play the lottery to do it. Have you ever lied to get a copy of your book sold? Well that other guy is misrepresenting the content that he is offering which is down and out wrong. So your sales aren't as good as his, does that really matter in the grand scheme of things? I mean you probably sleep more soundly at night, writing a book for the entertainment of all instead of scamming people out of money. I know I'd feel better about myself if I wasn't cheating people.
Not only is he getting peoples money but he's getting people to give money to the casinos. Hopefully he mentions to avoid CSMs and 6:5 tables in his books, that would be of some help wouldn't it.