After obtaining the book, three Bronze Men will respawn on the left. Deal with them using the same method.
After defeating the enemies, don't go up yet. You can find materials in the left corner.
After collecting the materials, continue up the stairs. You'll see a self-destructing enemy on the right side of the stairs; be careful of its explosion.
After the explosion, you can find the book [Mystery of Killing Intent Modification #1: What is Killing Intent?] on the car to the right.
