Debut author Heather Walrath has released “The Diva’s Daughter,” an opera-themed historical novel set against the political and cultural upheaval of Europe in the early 1930s. Set in Munich and Vienna in 1932, “The Diva’s Daughter” tells the story of Angelika Eder, an aspiring opera singer whose life is upended after the sudden death of her mother, a celebrated soprano. {…}