The word is murder : a novel
(Adult Book)

A woman crosses a London street and she is going into a funeral parlor to plan her own service. Six hours later the woman is dead, strangled with a crimson curtain cord in her own home. As brusque, impatient, and annoying as police detective Daniel Hawthorne can be, novelist Anthony Horowitz suspects the detective may be on to something, and is irresistibly drawn into the mystery. But as the case unfolds, Horowitz realizes he's at the centre of a story he can't control - and that his brilliant partner may be hiding dark and mysterious secrets of his own.