“Drug Deal” Network Analysis with Gephi (Tutorial) by A. J. Hirst.
A.J. reviews Even Wholesale Drug Dealers Can Use a Little Retargeting: Graphing, Clustering & Community Detection in Excel and Gephi, suggests that you read it before continuing, and then reviews how to use Gephi to converse with the drug dealer data set.
Good tutorial on Gephi and just as good on “conversing” with the data.