Been hoarding this one a little bit - as the published date is the 1st November and it doesn't seem fair to get everyone excited too far out :)
From the Blurb:
The black sheep of a wealthy grazier dynasty, gentleman artist Rowland Sinclair often takes matters into his own hands. When the matter is murder, there are consequences.
For nearly fourteen years, Rowland has tried to gorget, but now the past has returned.
A newly-discovered gun casts light on a family secret long kept... a murder the Sinclairs would prefer stayed unsolved.