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• The Siege Doctrine of General Yi

A book by the philosopher Yang Yin.

Chapters:

1. Introduction
2. What is a wall?
3. What is a gate?
4. What is an enemy?

(other chapters to be revealed when relevant)

The Siege Doctrine books seems to be mostly philosophical and notably ghostwritten. You do find some information about General Yi's previous campaigns but the text mostly consists of flowery language about how his domination of his enemies was the result of a mandate of heaven and spirits, of the need to overpower the mental fortitude of one's opponents, about the powers of perception and illusion contributing to the collapse of 
Jul 26 23:24:28 <wick-gm>       one's enemies from within before they collapse without. There's even a chapter on "What is a wall?" that goes on for 8 pages.

Jul 26 23:46:48 <wick-gm>       ((( Exerpt from the chapter on "What is a wall?": "Walls without are made of bricks and mortar, as walls within are made of ideas and convictions. Just as a wall without may fall from the removal of a single brick, a wall within may fall from the removal of a single idea. What's left is a jumble that cannot be repaired, cannot be replaced. It stops being recognizable a wall, and so stops being recognizable as a person. A mess, 
Jul 26 23:46:48 <wick-gm>       without cohesion or purpose. This is how walls are unmade." )))
Jul 26 23:47:20 <wick-gm>       ((note, I would hope most walls do not fall from the removal of a single brick.))

<wick-gm> Excerpt from The Siege Doctrine of General Yi, chapter 3, "What is a gate?": "The gates of a city are both their weak point and their strongest, the most easy place to enter and exit and yet the most difficult if properly fortified. They are like a mirage, of water out upon a desert, alluring and appealing, full of possibility, and yet the potential for a trap, for a deception, is there. Never trust a gate for you can never know 
<wick-gm> what’s behind it, what secrets might be held within..."

<wick-gm> Excerpt on the chapter on “What is an enemy?”: “Enemies can be hard, strong, can feel domineering and impossible to surmount, but every enemy has a place where they are soft, fragile, and yielding. To conquor them, you must be hard when you are soft, to make them soft where they are hard...”