The Word is Murder by Anthony Horowitz

One bright spring morning in London, Diana Cowper – the wealthy mother of a famous actor – enters a funeral parlor. She is there to plan her own service. Six hours later she is found dead, strangled with a curtain cord in her own home. Enter disgraced police detective Daniel Hawthorne, a brilliant, eccentric investigator who’s as quick with an insult as he is to crack a case. Hawthorne needs a ghost writer to document his life; a Watson to his Holmes. He chooses Anthony Horowitz. Drawn in against his will, Horowitz soon finds himself a the center of a story he cannot control. Hawthorne… Read more.