"Author Richard Grant and his partner Mariah are living in NYC when they decide to buy an old plantation house in the Mississippi Delta, in Holmes County (the poorest county in MS). Richard is British, and Mariah is from Tucson. Both are liberals..."
"This is the latest Richard Jury mystery, #24 in the series which started way back in 1981. Every book is named for a British pub. The Knowledge is a secret pub to which only London cab drivers (and very occasional special guests) are admitted.