Be crystal clear on what points your pub will make. There's a fine line between not telling readers enough and telling them too much. Eliminate what you feel they already know. Your own and others' knowledge is your best guide. If there is essential material that you think readers already know, put it in a sidebar or checklist.
Beginners can get a quick overview, and advanced readers can review it and move on quickly.
Eliminate anything that's not essential. Write to the pub's purpose only . This will help you avoid the trap of telling readers everything you know on the subject. Consider including an appendix of semi-pertinent material. It's available to those who really need it, but it doesn't overload the text.