Miranda James aka Dean James writes the Cat in the Stacks Mystery series which started in 2010 and takes place in Mississippi. It features widower and kind librarian Charlie Harris-and his Maine coon cat named Diesel. Charlie brings Diesel almost everywhere he goes in a halter with a leash. Together they solve murders.
Miranda also writes the Southern Sisters Mystery series which started in October 2014 and is set in Mississippi. It features Miss An’gel and Miss Dickce Ducote, two snoopy sisters who are always ready to lend a helping hand... especially when it comes to solving murders. They were originally characters in the Cat in the Stacks books, and are definitely worthy of their own series.