One author observed that his entire book could be read online by searching a few words.

The author observed society in order to understand it.

As the authors observe, there are reasons for both formats to endure.

"He was a better philosopher than clairvoyant," the authors observe.

One key to this paradox lies in something the author observes at the very outset of book.

The authors observed that "Fisher et al. reported no systematic changes in self-esteem compared to their control group."

Discussing the title, the author observed that the four words generate many ideas, including ones on subjects you would not normally think about.

Hitler "compared his death to a lost battle," the author observes.

How well could the author observe the thing he reports?

"She's a perfectionist, and she drives herself very hard," the author observes.