Death Comes to Pemberley book by P. D. James

The year is 1803, and Darcy and Elizabeth have been married for six years. There are now two handsome and healthy sons in the nursery, Elizabeth's beloved sister Jane and her husband Bingley live nearby and the orderly world of Pemberley seems unassailable. But all this is threatened when, on the eve of the annual autumn ball, as the guests are preparing to retire for the night a chaise appears, rocking down the path from Pemberley's wild woodland. As it pulls up, Lydia Wickham - Elizabeth's younger, unreliable sister - stumbles out screaming that her husband has been murdered. Published By Faber & Faber on 2013-11-01