After picking up the book, turn around and head down the slope. There are enemies in the pool ahead, and materials inside the sedan chair.
Enemies will also ambush from the left. Defeat them and collect the materials ahead.
From here, turn back and go up the nearby stairs. There's a small path to the right; reach the very end to obtain a purple item.
Turn back and continue along the main path until you reach the stairs ahead. There's a large amount of Dust on the corpse to the right. After collecting the Dust, don't proceed further as the right side is a dead end.
Keep going left and defeat the enemies along the way. There's a material on the corpse in the left corner. After collecting it, climb over the wall.
After climbing over the wall, there's a book on the carriage opposite, and materials on the corpse to the left.
The book is [Meditations #8: Crimson Forest].
