Mark Twain's A murder, a mystery & a marriage

"Mary Gray is the prettiest girl in Deer Lick, Missouri, and shy Hugh Gregory loves her as much as she loves him. Sally, Mary's mother, is happy for her daughter and convinces Mary's father, John, that Hugh is perfect for Mary. Unfortunately, John does not get along with his rich brother David, and on the eve of the wedding, David reveals that he is leaving his entire fortune to Mary in his will--on the condition that she never marry Hugh! No sooner is the ink dry than David is found dead."--Page 4 of cover.