What is the Summary of acceleration by Graham mcnamee?

"In this suspense story, the main character Duncan is haunted by the fact that he was unable to save a drowning girl one fateful afternoon the previous September. This summer, he has a job working underground at the Toronto subway lost and found. When business is slow, Duncan rummages through unclaimed items and uncovers a strange, leather-bound book which turns out to be the diary of a potential murderer. When the police seem disinterested, the teen takes matters into his own hands, and with the aid of his two best friends, tries to track and trap the would-be murderer before he can strike. This fast-paced journey is accessible to all readers."