Dorothy L. Sayers 
Clouds of Witness 

As Lord Peter Wimsey enjoys his time in Corsica, he’s brought back to reality when all of the headlines claim that his brother, Gerald, has been arrested for murder. Gerald, who had been on a hunting trip at the family’s estate in Yorkshire with his brother-in-law, had gotten into a fight with the man about his sordid past. Hours later, the man is dead, and Gerald is the main suspect. As Gerald maintains his innocence, it’s up to Wimsey to figure out who the actual killer is and save his brother!