The Ghosts of Iron Bottom Sound : Why is Savo Sound known as Iron Bottom Sound? Paddy, a young New Zealand schoolboy, becomes so obsessed with a book about the wrecks of warships sunk in World War Two battles at Guadalcanal that he's lucky not to be killed in a traffic accident. His parents ban him from reading the book. But Paddy can still hear the voices of men who died during the Battle of Savo Island, one of the battles depicted in the book. He is horrified . . . and fascinated. Whose voices are they? Why are they reaching out to him? Are they dangerous? Gradually he realizes that some of voices are Australian, like his grandfather. His grandfather had served in HMAS Canberra, an Australian ship sunk in the battle. While Paddy's Grandfather survived, others didn't . . . and cannot rest.