Book excerpt: Heads-up confrontations can occur in any game, even when every seat is occupied. Adjusting to the amount of aggression can be difficult since heads-up battles require you to bet and raise with many hands. This book covers heads-up tournaments, cash matches, the final two of a multi-table tournament, and blind-vs-blind play at fuller tables. Mastering heads-up no-limit hold 'em is invaluable if you're looking to add a loose-aggressive component to your game. With more heads-up matches available, becoming proficient in them is highly profitable.