Silent on the Moor by Deanna Raybourn

Lady Julia Grey travels with her sister, Portia, to Grimsgrave Hall in Yorkshire. Portia is going to help out the new owner, Nicholas Brisbane, get the decrepit estate in order. Julia, in love with Brisbane, uses the visit to spend time with him. The sisters, however, are shocked at the state of the place and the behaviors of the last members of the destitute Allenby family, who are living at Grimsgrave thanks to Brisbane's kindness. It's up to Julia to untangle the mystery of the Allenbys after someone is poisoned. Silent on the Moor is the third book in the Lady Julia Grey series and while it's about the same number of pages as its predecessors suffers from too little plot to sustain a book of that length. However, I'm thrilled to see the relationship of Julia and Brisbane move forward, so I'll look for the next book when it's published.