On the Straight and Narrow by Faith Martin
When a pretty French student is found dead in her room at an exclusive private Oxford college, everyone assumes it is yet another sad case of accidental drug overdose. But Detective Inspector Hillary Greene quickly begins to think otherwise. As the investigation unfolds, D.I. Greene soon discovers that the young victim had been leading a very interesting life indeed. And when a highly unusual cause of death is established, she finds herself leading a high-profile murder inquiry. This is certainly no time to be distracted by a cheeky animal rights charity trying to claim her house, or fret about the permanent transfer to her station of the man who once investigated her for corruption. Murder beckons!