Tip to aspiring authors: never, ever, EVER presume to know (A) what your readers know or don't know ("10 things you didn't know about Topic X") or (B) what you

Tip to aspiring authors: never, ever, EVER presume to know (A) what your readers know or don't know ("10 things you didn't know about Topic X") or (B) what your readers should feel or be ("you should be a vegetarian/Luddite/whatever too"). It's downright condescending and is not earning you any readers.