Called US writing style over here, just being overly verbose. Course literature, e.g. Calculus, suffers from this. It is a style in which you wax on and drive home the point by repetition.
This style is popular nowdays and finding books that succintcly describes a subject is hard. This is mostly because you need to have common ground, and writing for the smallest common denominator is better.
Writing succinctly is a difficult skill that requires practice. The US government has put a lot of work into making things easier to understand in recent years. I have a Masters in Public Administration. My professors hammered home the idea that lawmakers and the public aren't going to read your 50 page policy analysis, so matter how brilliant it is. My final paper in Project Management class was worth 25% of my final grade and had a one-page limit. It's one of the most difficult projects I've ever had. If you're interested in learning more about this style of writing, check out plainlanguage.gov.
I actually think Calculus textbooks are justified in being long. he material is just so hard to grasp for newbies that giving you more and more examples sort of provides you with more time to digest the ideas in the background. Many students need that at that stage in their studies.
This style is popular nowdays and finding books that succintcly describes a subject is hard. This is mostly because you need to have common ground, and writing for the smallest common denominator is better.