It's bullshit. I saw some people talking about something similar a while back, and some of them seemed pretty convinced. I just glanced through the book, and the system makes NO SENSE.
There are 3 sections you can bet on (Low, Mid, High). It says to only bet after one of the sections has not turned up in the last 7 spins. Their reasoning for this is that there is only a 1 in 25 chance of missing one section 8 or more times in a row, so you have really great odds. Anyone with the slightest bit of math sense can tell you that this is complete bullshit, as previous outcomes have NO bearing on the next ones. The wheel could have missed low 100 times in a row, and the odds of hitting it next time are still the same, 1 in 3.
This ebook is designed for suckers.