One of the things that makes the Spark book so good is that the writing is economical. For one thing she doesn't use adverbs when writing who is speaking. This is something that took me about seventeen books to learn. I finally did it in my book that will be published in June/July by Ballantine. There is no reason to write anything more than: he said, she said or other variations on this. No adverbs are needed. Ever.
For instance, to write, "I want you to get out," John said angrily. is pointless because you're reading that John is angry after the piece of dialogue. If set up correctly you'll know how John is saying this as you read it.
Many writers use adverbs and too many adjectives because they don't trust their work to be strong enough. And also to bulk up their book.
"Don't use adverbs after your dialogue," I said.