Look for connections
Start with the site's foundation, the details already established, and the questions you've started asking yourself. Consider how those things connect to:
- Each other
- Other setting elements in Book II
- The setting's timeline (see ages of the world, Book II)
- Things the players are interested in
- The PCs, their stuff, and their pasts
- Established NPCs and threats
- Previous events in-game
- The questions on your "I wonder…" list “I wonder…”
Let these connections prompt questions, suggest answers, or just inspire new ideas. Think about how all these elements fit together in your site.