In this chapter Lang addresses the important issue of academic honesty and in particular plagiarism.
The most interesting fact in the chapter is the ubiquitousness of cheating - Lang cites that surveys show that 47 percent of graduate students have cheated in the past year.
Having taught a three hour session on scientific integrity followed by a one page assignment where I caught 33 percent of the students subsequently cheating/plagiarizing this is a topic I'm particularly interested in.
There is lots of useful advice here, trying to make assignments unique, use electronic measures to detect plagiarism and of course making it clear to students what you take plagiarism to be.
In particular the advice to not take matters into your own hand and deal with things yourself but instead use the university's procedures for dealing with misconduct is excellent, there is no easier way to get yourself into serious trouble than taking matters into your own hand.
What I would have like more of however is advice about dealing with the system, in particular when people are resistant to admitting plagiarism has been detected because it is a hassle (this happened to me, people thought I was just making a big deal about a small assignment).