After getting the book, jump directly off the cliff and head left.
You can see a small waterfall ahead.
Defeat the enemies near the waterfall, turn back to grab the purple item next to the waterwheel, then head up the stone path to the left.
As you come up the stone path on the left, look left—an enemy will ambush you. Defeat it and take the purple item behind it.
After obtaining the purple item, there's a wooden plank behind you that you can climb out of. Moving forward will take you back to the post station.
Now, return to the area near the post station and continue toward the bridge. On the right side of the bridgeThere's a gap you can drop down through. Go down and grab the purple item.
After obtaining the purple item, turn around and go straight. Defeat the enemies ahead; there's a material on the right and a chest in the house on the left.
This is the chest we couldn't reach earlier. After opening it, you can climb out to the left.
After climbing out, we find that the monks and merchants here have turned into monsters. This triggers the windmill dialogue from earlier (though it doesn't seem to lead anywhere).
Defeating the monk at the entrance yields the story item "A String of Prayer Beads" (if it doesn't drop, defeat all nearby mutated enemies once). These beads are useful in Map 3. After fully exploring this area, Map 1's exploration rate reaches 96%, so we can start Map 3.
