Strange that this got downvoted since it makes an arguable point and has links to relevant resources. Reading full books gives me a sense of accomplishment and pride as much as the next guy, but I'm not going to beat the need to do it over anyone's head as long as they're getting the information they need. I agree with the sentiment of this comment. The central ideas expressed in many non-fiction books (business especially) are often found within the first 30 pages only to be repeated ad nauseam through the remaining pages.
Sometimes I'll read books which argue some point I already agree with, where the first half of the book tries to convince the reader the point is valid, and the second half spends time debunking counter-arguments. In such cases, jumping to the end can be the best use of time.
