This was beautiful. Almost everything was perfect (OK, Peter randomly proposing quite early was a bit odd but Harriet's reaction to it made up for that).According to very reliable sources (*cough* Wikipedia) this book was inspired by the Florence Maybrick-case and it does have parallels (the nurse and something else which would spoil a bit too much) but it's not simply a carbon-copy of the Maybrick-case with a happy end (come on, that's not a spoiler). Interestingly in this book the Maybrick-case also happens and Peter studies it when he is trying to help Harriet.The plotting was again gripping (like in all Sayers-novels I've read so far) and the characters remain great (loved the side-plot with Parker and Wimsey's sister).