Ghosts, A Hard Study is a gripping psychological horror novel written by acclaimed authors Flor O'Squarr and Ch. (Charles). The book tells the story of an inquisitive detective who goes to solve mysterious cases full of secrets and unpredictable turns of events. With each page, readers are immersed in an atmosphere of tension and anxiety, feeling the vibrations of mysterious ghosts that haunt the heroes in their dangerous investigations. "Les fantômes, étude cruelle" is a book that mesmerizes with its mystery and richness of detail, which will leave readers impressed and wanting to read it again and again.