Hey guys, I own both Matthew Janda's books and I have been reading them recently. I find myself often confused by the content of the book and I understand it is because I am not an advanced player.

I've read all the Harrington on cash games, the live version and online version but I think some part are outdated.

I'd like to find a book/site that learn non-basic and non-advanced stuff. Something right in the middle for players like me who struggle with medium-level stuff. I am playing 25nl-50nl online and most of the time I crush these stakes but I have a hard time knowing why I do things. I do them because I know how to exploit my opponent but that's pretty much it.

Where should I get my knowledge now? My goal is to read both Janda's book again and understand at 100% the content. Is there a good book somewhere? Coaching? Training site? If so how to chose and why?