disclaimer: with "book" I'm mainly referring to texts that gravitate around a technical / scientific topic, like math books or programming books, not really romance or narrative.
Considering the tradeoff and the target of such product, I should use icons in a book that falls in the previously described "family of books"?
The keypoints that I found are:
tradeoff between distracting the user from the content and inform the user about the semantic of the content
sometimes a gray background is enough to recognize
some piece codebut it's a convention not really popular or viable in book world, plus most of the time you have more than just a duo paragraph + code.
if you use icons you are likely to get an impact on the layout of the page, and sometimes it's not even possible to paginate your content at all (epub, e-books in general)
if you distribute your content on multiple channels, and for example, on 1 you use a
epub, you are not shipping the same feature (you can give a specific layout to a
In general the real question is: it's easier to interface yourself with a book that uses icons or with a book that simply tries to lay the content in an intuitive and reasonable way?