Shorthanded Table Strategy is written by Abdul Jalib M'hall.
Here's a bit: "Short-handed tables tend to be heads up by the flop, and heads up play is a tremendously psychological game. Categorize your opponents and exploit their weaknesses, radically adjusting your play for the opponent. Against overaggressive players you should be passive-aggressive; be tenacious and let the overaggressive player bluff into you, shedding your passivity for aggressive counterattacks for value late in the hand. Against weak-tight players likely to fold, you should be overaggressive, but just be sure that they are really weak-tight, not passive-aggressive. Against passive-tenacious-loose players (i.e., calling stations), bet for value and almost never bluff."