This chapter discusses a particular type of Guerrilla Analytics output called a report. The typical work products discussed so far go through many iterations. They may even be for internal delivery only, produced for the benefit of the team and never seen by the customer. Reporting on the other hand is a more formal team output. It is often the summary of a project or a key project milestone. A report document usually interleaves a written analysis, interpretation, and commentary with analytics results. This type of document provides specific Guerrilla Analytics challenges that differ from typical work products.