Clarify if the 3 types of mediation mentioned are the only types of interface mediation there are or if there are more types-- I found that to be unclear
perhaps include some diagrams that show the relationship between interface and the context it is mediating
“Whereas librarians, card catalogs, and people in our social networks used to mediate our access to information out of a mission of access, literacy, truth, and public good, now search engines, out of a mission of profit, speed, and convenience.” <- this sentence is maybe too high density
"ubquitious" missing an "i". typo
bold "mediate" when used throughout the chapter
Typo: "Because of each of these interfaces must teach different things, one must know foundations of what is being mediated to design effective interfaces".
Typo: "For example, think about what you’re using when you’re operating a calculator app on your phone: it’s really a way of asking a computer to performing basic arithmetic operations on your behalf."