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.
blurb. 1. a brief advertisement or notice, as on a book jacket, esp. one full of praise.2. to advertise or praise in the manner of a blurb.[1910â15, Amer.lurb. 1. a brief advertisement or notice, as on a book jacket, esp. one full of praise.