The Categorical Imperative is supposed to provide a way for us to evaluate moral actions and to make moral judgments. It is not a command to perform specific actions -- it does not say, follow the 10 commandments, or respect your elders.
A blurb on a book can be any combination of quotes from the work, the author, the publisher, reviewers or fans, a summary of the plot, a biography of the author or simply claims about the importance of the work.
1 Magnetic Plot Device: A plot device whose very presence causes things to happen. 2  Plot Coupon: An object necessary to continue or resolve the plot. 3  Plot Coupon That Does Something: A plot coupon that has uses beyond clearing a particular obstacle.  Sword of Plot Advancement: A plot device that can kill stuff.