Gustav Kobbe (4 March 1857 - 27 July 1918) was an American music critic and author, best known for his guide to the operas, The Complete Opera Book, first published (posthumously) in the United States in 1919 and the United Kingdom in 1922. Kobbe was born in March 1857 in New York City, to William August Kobbe and Sarah Lord Sistare Kobbe. His father, William, was born in Idstein, near Wiesbaden, in the Duchy of Nassau (now part of Germany) and represented that country in New York as consul general until it was absorbed by the Kingdom of Prussia in 1866. Sarah was born in New London, Connectic...