"Almost Blue" is a novel written by Carlo Lucarelli that follows the story of a blind girl named Silvia who is able to identify people by their footsteps. She becomes involved in a murder investigation when she hears the footsteps of the killer. The novel is set in Bologna, Italy and explores themes of darkness, mystery, and the power of perception. As Silvia helps the police track down the killer, she must confront her own fears and limitations. The novel is a gripping thriller that keeps readers on the edge of their seats until the very end.