It's been awhile, and I can't remember the book I used in college. But I've heard good things about Harvard Business Review's business communication textbook.

It's been awhile, and I can't remember the book I used in college. But I've heard good things about Harvard Business Review's business communication textbook. https://www.amazon.com/Business-Communication-Harvard-Essentials/dp/159139113X https://www.amazon.com/Business-Communication-Harvard-Essent... After that, I'd suggest looking at what business colleges and universities use for their coursework. At the higher levels, there's a special language and culture to business communications that's used to identify the "in" people and the "out" people. The elite universities teach this, of course.