'Quintus Oakes' is a detective novel by Charles Ross Jackson. It revolves around the a detective named Quintus Oakes, who serves in the capacity for law enforcement officials as well as a private investigator. He speaks German, French, Italian, and perhaps more languages, fluently, and can secure evidence anywhere. He has travelled over the world several times. One year he was away ten months on a case, and secured the necessary evidence for conviction in Sydney.