I own all of Nathan's books he is one of my biggest inspirations, I even use his strategies in free rolls, I finished 3rd out of 2700 on Tuesday night on
888 and won $109 ticket (
sharkscope)and so that alone paid for all the books. Been following him for years, the guy is legit and has been around forever.
You can tell he is good by how many people in the GTO crowd dislike him, as he hammers home consistently, people at micro usually think GTO is a computer game about stealing cars and it will not work, you can not
bluff a fish at the micros because they do not understand, they have a King and they are calling!!
The standard of play is a bit higher than it used to be obviously, but in general its fish city and Nathan is the Gold Standard, he knows more about this stuff than anybody else because he has played the most and won the most at that level. Hope that helps have fun fishing now you have the book.