Subtleties of Manipulation was a book that Jason found in the upper level of the Repository of Learning. Its author was Damak, a displacer father of the loremaster of the Repository of Learning, displacer Bridonus Keplin Dunscrip Garonicum the Ninth, and Grandfather of displacer Copernum, Chancellor of Trensicourt before Jason outwits him(read Beyonders, A World without Heroes). Its introduction reads:

"Manipulation is a quiet tool of majestic power. Artfully manufacturing desires in others to suit one’s own needs can be accomplished on an individual basis or on a worldwide scope. Clearly, a study of manipulation requires a profound understanding of the selfish motivators that drive men to action. Different motivators function best depending on the nature of the minds one seeks to dominate. Manifold motivators are available, including fear, the desire for wealth or respect or power, lust, duty, obedience, love, even altruism. Endless combinations may be employed to reduce the staunchest will to a malleable plaything. Learning to discover the appropriate mix of motivators for any give individual or group comprises the essence of manipulative studies.

"The master manipulator lies as little as possible. He believes most, if not all, of what he professes. This quality makes him difficult to unmask. Once a subject realizes he is being manipulated, defenses are engaged and future machinations become exponentially more challenging. The more satisfying victories occur over adversaries who do not know they have been conquered."