Enron was one of the largest energy companies in the world in the late 1990s, reporting revenue over $100 billion. It has over 20,000 staff and—as of the year 2000—there seemed to be no indications that something was very wrong.

In 2001, the Enron Scandal occurred, where it was discovered that Enron was undertaking systematic, fraudulent accounting practices. This fraud was deliberate, wide-ranging across the company, and for significant amounts of money. After this was publicly discovered, its share price dropped from more than $90 in 2000 to less than $1 in 2001. Enron shortly filed for bankruptcy in a mess that would take more than 5 years to finally be resolved.

As part of the investigation into Enron, the Federal Energy Regulatory Commission in the United States made more than 600,000 e-mails publicly available. Since then, this dataset has been used for everything from social network analysis to fraud analysis. It is also a great dataset for authorship analysis...