After opening this chest, look up. You can use the Kusarigama to climb up, which will take you to the teleportation point near the Killing Intent Tower.
We walk to the teleportation point and use it to teleport to the "Dragon Pillar Overlook" waypoint.
After teleporting, turn around and head left.
At the fork ahead, turn right. The left side is where we entered through the door earlier. There are books behind this pillar.
This book is [Righteous Alliance Miscellany #5: Jianghu Wanderer's Letter of Allegiance].
