British author Jilly Cooper, known for her bestselling novels like “Rivals” and “Riders,” has died at age 88. Her agent announced the news on Monday. A statement from her family described her death as an unexpected shock. Her agent, Felicity Blunt, praised Cooper for defining culture, writing, and conversation for over 50 years. Cooper is best remembered for her series, The Rutshire Chronicles, featuring the charismatic hero Rupert Campbell-Black. Her books have been enjoyed by many, including former British Prime Minister Rishi Sunak, who appreciated their escapism.