The Shortest Way to Hades by Sarah Caudwell
Die now, pay later...It seemed the perfect way to avoid three million in taxes. Everyone in the family agreed to support the heiress, ravishing raven-haired Camilla Galloway, in her court petition to change the trust - except dreary cousin Deirdre. Then Deidre has a terrible accident which is when the young London barristers handling the trust - Cantrip, Selena, Ragwort and Julia - summon their Oxford friend and mentor Professor Hilary Tamar to Lincoln's Inn. They suspect foul play and so poor Hilary is dispatched on a most perilous quest to find the truth and unmask the killer...This witty and intriguing crime novel features the worldly yet principled young set of legal experts created by Sarah Caudwell - Cantrip, Ragwort, Julia and Serena.