Death of a Clergyman: A Pride and Prejudice Mystery (Miss Mary Investigates #1)
Riana Everly

Alexander Lyons has made a pleasant life for himself in London, far from his home village in Scotland. He investigates missing documents and unfaithful wives, and earns an honest living. Then one day Mr. Darcy walks into his office, begging him to investigate the murder of Mr. Collins and to prove Elizabeth innocent of the crime. It seems like a straightforward enough case, but Alexander did not count on meeting a rather annoying young woman who seems to be in his way at every turn: Mary Bennet.
As the case grows more and more complicated, Mary and Alexander cannot stop arguing, and discover that each brings new insight into the case. But as they get close to some answers, will they survive the plans of an evildoer in the midst of quiet Meryton?