MADRID — “Reading time: 2 minutes…” is a more and more common alert from digital media under the headlines of the articles they publish. They are clearly aware of the acceleration of time and the limited availability most people have to dedicate two minutes of their life to any specific issue. For the latest news & views from every corner of the world, Worldcrunch Today is the only truly international newsletter. Sign up here. Fortunately, books do not include this warning on their covers — at least not yet. Because something is happening — as a report from the U.S. non-lucrative organizatio…