* Artificial Intelligence
* General Game Playing
* Game Theory
* Philosophy of Artificial Intelligence
* Poker-playing AI
He is also the author of:
* Logical Systems and Models for Knowledge-based Systems (2005)
* Computer Games: A New Dimension in Computing Science (2012)
* Game Analytics: Maximizing the Value of Player Data (2014)
* Mastering the Game of Go with Deep Neural Networks and Tree Search (2017)