USSP Guidebook

[Mrrpip]

About the PR

Take two, now with 2000 less files.

• Adds a USSP guidebook with 2 entries. (Remember to check the objectives in the USSP.XML file, I had to make it up as I went along.)
• Adds two new book spines.

Why / Balance

Media

2026-05-18.22-54-43.mp4

Requirements

• I have read relevant guidelines/documentation to this PR found on our devwiki.
• I have added media to this PR or it does not require an ingame showcase.
• I can confirm this PR contains either no AI-generated content, or AI-generated content that meets our guidelines.

How to test

Breaking changes

Changelog

[github-actions]

RSI Diff Bot; head commit 5af4f31 merging into 77d56ae
This PR makes changes to 1 or more RSIs. Here is a summary of all changes:

Resources/Textures/Objects/Misc/books.rsi

State	Old	New	Status
decor_mono_middle_segmented_bottom			Added
decor_mono_middle_segmented_top			Added