This was my first encounter with Lord Francis Powerscourt, and I shall snub him in the future.
Given the lures thrown out to the reader -- great estates, wine buff history, business derring-don't, gentleman sleuths, and a bride with mysterious reasons to marry -- I expected a modern version of the "golden age" mysteries of Dorothy Sayers, and if not Sayers' philosophical depth, at least the quick pace and plausible twists of Agatha Christie.
Instead, I got cardboard cut-out characters with stilted dialogue, described in a bland, yet wordy manner reminiscent of the paragraphs that how-to-write books use to demonstrate how not to do it. The plot seems (at page 104) to hinge on business decisions; and I have read SEC filings that contain more drama, livelier prose, and a more distinct point of view. If this style is meant to ape the prose of 1907, Dickinson should spend more time in the monkey house to develop a better ear.
It's unusual that I don't stagger to the end of a mystery under sheer momentum, but the only way I'm likely to finish this one is if either I develop an impacted tooth and have to stay up all night or if Arizona suddenly has a blizzard that snows me in. Clearly somebody likes this series, since this is book nine, but that somebody is extremely willing to tolerate weak writing for the sake of a clever idea. (And reading back, my own writing has become weirdly stilted by contamination. Out, damned subordinate clause, out!)