Rated specifically at 3.75 stars.
This is a tricky review to write as I enjoy this series and did like this book, but...
There are many positives; the pacing is good, and the writing is strong, and the dialogue pretty much suits the period and characters. The book is well researched and historically accurate in the main and what needs explaining for context is done simply and well. The main characters are believable and have grown through the series. Their conflicting beliefs, attitudes and social positions, as well as their defining characteristics, mean they may often clash but also make the passion and relationship more believable. This familiarity with the characters and prior knowledge does improve the read, but it is not essential to enjoy the book. As always, I am reading these books as I find them and often out of chronology, and it has not mattered yet.
On the downside; this particular instalment has elements other writers have done better.
1. Sulari Gentill does similar characters better- Lord Edward and Verity are very similar to her characters where there is a young lord of an establishment family with a disapproving older brother, a sister in law he has a soft spot for, a nephew he adores, and has disreputable friends and wild and provocative socialist love interest. Gentill's series is set in the same time period and tackles political history and social issues more thoroughly whilst also throwing in a good smattering of real-life figures and events as Roberts does. That is not to say Roberts' work is bad it just lacks the depth.
2. Dorothy L Sayers writes a detective Lord/ butler relationship with more wit and charm and a far better, richer and rounder butler character than Fenton (who is sadly lacking in this book).
3. Agatha Christie, Josephine Tey, Edward Marston, Ruth Rendell, Colin Dexter, Ngaio Marsh, and many others wrote much cleverer and more intricate plots. I knew who the guilty party was almost as soon as they were introduced.
4. Previously, the main characters have been inciteful and explored deduction and analysis of information, but in this book that seems to be missing, implying the truth would have been far too obvious if the usual intelligence and interplay between the main characters was evident.
All that said, what Roberts does do is craft all the ingredients together into an enjoyable dish. It may not be Michelin cuisine, but it is still tasty and satisfying like all good comfort food.