Gentle read this one. Now I've not read the previous books, but there is enough suggestion in the narrative to pencil in previous experiences; but I enjoyed this book without needing to have read the previous ones.
Like I said, gentle read. There is much doggy goodness, flowershops, bright lad, bright lass from troubled background, and various other village characters to add flavour to the soup. Obviously, it's a murder mystery, so it would be foolish to say too much about the plot. However, having seen my wife do flower arrangements, I was very impressed at the speed of manufacture of Simmy Brown's floral constructions, as well as her driving skills around the Lake District.
This is absolutely not a gruesome Jo Nesbo, nor a tortuous Rankin, so can be read quietly and calmly on a sofa in Sussex in a few hours. Perfect holiday pasttime.