MURDER AT THE BOSTON REGATTA: Cozy Historical Mystery (Massachusetts Cozy Mystery) by ANDREA KRESS

Nobody thought the day would end with a murder that no one in Boston wants solved. Nearly everyone in the city came for the annual festive regatta. By day's end, Professor Shepherd, a longtime conservative economist at Boston University, is found floating face down in the Charles River. Lt. Brendan Halloran, present at the regatta with his wife Amanda, takes charge of the investigation. The well-known educator had enemies in every corner of the city, from ivy-covered classrooms to the genteel parlors of Beacon Hill. Academic rivalries. Personal grudges. Buried secrets that someone was willing to kill to keep.