What a brilliant idea! Niven has taken scientific studies, summarized their results, and placed them in a format that can easily be read by the general public. He is to be commended for taking discoveries from the academy and making the results useful to anyone interested enough to tap this resource. To illustrate, I'll cite a few examples. He tells readers "people who regularly keep a journal, or some kind of written record pertaining to their asperirations, are 32 percent more likely to feel like they are making progress in their lives." A person who wanted to know the source can find the citation in the back of the book and review the study in detail.
A second example, "your success is far more dependent on your behavior now than it is based upon where you grew up, where you went to school, or whether your path so far has been easy or difficult." The source here is Arrison, 1998 and is listed in the bibliography. A third example is "people who approach things with order, common sense, consistency, and persistence will ultimately succeed." Again, the citation is given. There are 100 "secrets" presented. This is an inspiring motivational book. I highly recommend it.