I am not sure if there is an ebook about this. Many ebooks or books I found are for lessons, though some are detailed, but not a SOP. So thinking to try to write a simple ebooks for this topic. Not sure if people are willing to buy this kind of ebooks for about 10 USD?
A "BIG" selling point is the title,have you thought about that? If yes,what would your title be? Your price of 10 USD seems reasonable.