My experience is that books come in two forms: ones that can be summarized by a blog post (e.g. any Malcolm Gladwell book) and those that contain content of irreducible complexity (e.g. history books or textbooks). I usually get bored with the first type of book because it just rehashes the same thing over and over again. So, when you choose book vs article, I think this distinction should be part of the thought proc…
Business books — even the insightful ones — are typically only 2-3 pages long (there a few, very few, exceptions). But that can’t sell at the airport so they are padded out like washing powder.
* "inspire" me with useless stories from other people, i.e. stuff that isn't anything beyond "wow amazing feat!" with no practical utility. These are most of the trash pop-biz or pop-psych books that talk about the marshmallow experiment for the Nth time... * use their book to get speaking engagements (e.g. by checking their website) * does the book contain a goofy diagram to abstractly illustrate their point in a bass-ackwards way? (The Conjoined Triangles of Six-Sigma Success!)