A Billiard Atlas on Systems and Techniques, Volume IV, by Walt N. Harris
An incredible collection of detailed systems and techniques. Even systems where aiming points are calculated on the walls of a billiard room.

A Smarter Way to Learn Pool, by George Fels
Illustrates how players can quickly and dramatically improve their shot-making skills by learning to tap into the mental side of what every expert agrees is a mental game.

Billiard Atlas on Systems and Techniques, Volume II, by Walter Harris
An incredible collection of detailed systems and techniques. Even systems where aiming points are calculated on the walls of a billiard room.