Criminal police captain Luo Hao stood at the scene of the crime, frowning. This is a typical secret room, with the doors and windows tightly closed and no traces of damage. The deceased was a middle-aged man, lying in the middle of the study room, with several books and a note with scrawled handwriting scattered around him.
Luo Hao looked around, trying to find any possible clues. His eyes finally fell on the book in the deceased's hand. The pages were slightly opened, seeming to be telling something silently.
"Captain, preliminary inspection did not reveal any suspicious fingerprints or footprints." A young police officer reported.
Luo Hao nodded, and his eyes fell on the book in the deceased's hand again. "This book... Seems a little unusual." He said to himself.
"Captain, do you think there's anything wrong with this book?" The young police officer asked curiously.
