The fifth book is a reference book called "Forty Things to Note for World Destruction," authored by an anonymous writer. The cover shows a scene of doomsday with thunderstorms and fires. The content involves preparations before destroying the world, such as ways to conceal one's True Name to resist the Prophetic Faction, and preparing more safe houses, etc.
The sixth book is a guide titled "The Tactics Master's Self-Cultivation," authored by Youlan Weiser. The cover depicts Ash, Sword Maiden, and Witch walking in front, chatting and laughing, while Weiser follows quietly watching them. Ash opened it and was immediately vexed by the content inside.
"...The captain likes to relax in the back, don't point it out. You can invite him to observe together, providing opportunities for him to relax. When the captain is questioned, support him in time, but make sure it's not flirtation..."
