One of the best editing books I own is Theodore A. Reese Cheney's GETTING THE WORDS RIGHT, How to Rewrite, Edit & Revise. One reason because of this particular stanza in the book, an an interview between the Paris Review & Hemingway.
Paris Review: How much rewriting do you do?
Hemingway: It depends. I rewrote the ending to A Farewell to Arms, the last page of it, thirty-nine times before I was satisfied.
Paris Review: Was there some technical problem there? What was it that had stumped you?
Hemingway: GETTING THE WORDS RIGHT.
~~ Every author's goal, Getting the Words Right.
What editing books do you love? Whatever holiday you celebrate, I hope it's joyful!