The core text covers a myriad of advice and discussion regarding the practical nature of critical thinking. It is enhanced by annotations and highlighting. While these may be potentially distracting for a conventional reader (oh dear!), they do two important things. First, they validate the asides that pop into a reader's mind all the time. Secondly, they give permission for the text to be a living text. It is messy and begs to be messier. Quirky graphics do what cartoons have always done -- make the obvious, sometimes cutting, comments -- in ways that serious texts may stultify or avoid.