In addition to the Jonathan Little and Vorhaus/Duke books described in the previous link (to resources for self taught players), I recommend Excelling at No Limit Holdem, by Jonathan Little. Each of the book’s 17 chapters is authored by a different expert, addressing a different aspect of the game. Pick the ones that are helpful to you. They vary from light (Mike Sexton's chapter on “Great Plays from the Great Players” ) to very dense (Will Tipton’s chapter on "Game Theory Optimal Strategies") with everything in between (such as Olivier Busquet’s chapter on Heads Up strategy).

Gus Hanson’s book, Every Hand Revealed, gives you an extraordinary glimpse inside the mind of a world class poker player. He explains his decision making process in every key hand he played in the 2007 Aussie Millions tournament, when he took first place in a field of 746 players . You will come away with a new understanding of all the things you SHOULD be thinking about before deciding whether to fold, call or raise in every pot you play. Of course doing it is much harder than knowing what to do, but knowing what to do is an essential starting point on the road to growth and improvement.

The Main Event With Jonathan Little, is an in-depth analysis of 54 hands he played in the 2014 WSOP $10,000 Main Event. Like the Gus Hanson book, it gives you a chance to observe how a world class player thinks through each decision. Humbling, but instructive.

See the discussion of and in the previous link (to resources for self-taught players). This teaching site offers a wealth of videos and webinars for players at all levels of experience and expertise, as well as individual coaching for advanced players.

Equity Calculator. See the discussion in the previous link (to resources for self-taught players). This is an essential tool for learning range analysis, which is the key skill you must acquire in order to move up to the next level. At the advanced-intermediate level and beyond, poker is no longer a game of “my hand versus your hand”. It becomes a game of “my range versus your range”. Developing a balanced , noon-exploitable range, and learning how to accurately put your opponent on a range of hands, is the gateway to moving up. In order to do that in real time at the table, you must put in the hours away from the table working with an equity calculator.

Insta Poker. See the discussion in the previous link (to resources for self-taught players). A great practice tool, for use before and between live sessions.

ShareMyPair. See the discussion in the previous link (to resources for self-taught players). This online video app gives us all the ability to participate in a worldwide poker discussion group, at any level that suits us. A great 21st century equalizer. How else could I discuss my hands and theirs with world class pros like Daniel Negreanu, Phil Hellmuth and Faraz Jaka?