Deadly Script: My Secret Room Became a Murder Scene

What I designed is an "unsolvable" secret room for people's entertainment. Imitated my "ghost", but used it to design a series of "unsolvable" murders. Overnight, I went from genius designer to prime suspect. If I want to survive and reverse the case, I must understand every logical trap I have laid out better than the murderer. I wrote the script of this life-threatening game, but the director... Was him. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.