This slim volume is a textbook on "critical thinking," which seems to be the art of argumentative analysis. You read an argument, ask a series of questions, and thereby test the worth of the argument.
A chapter is devoted to each question, and there are exercises at the end for students to hone their skills. Most of the questions are common sense, but some might not be so obvious if you have your mind in neutral as you skim over an editorial or a brief.
All in all the book is an excellent exercise in deconstructing deception and ferreting out fuzzy thinking. It give little guidance, however, in how to construct a sound argument. It seems to me that recognizing poor argumentation is only half of critical thinking. sound argumentation is the other half.