This Edition: Bloated and Tedious
Walter Piston's 'Harmony' is the finest book with this title (there have been many) ever written. This edition turns that great work into a bloated, tedious, clumsily-written monstrosity. Its introduction admits that Walter Piston, had he lived to see it, would not have approved of much of its additions and deletions. Let's take it at its word and prefer an earlier edition.