This chapter focuses on the form of the case study. The author introduces the Case Jigsaw, a tool for case writers to create a structure to hold together the contents of the case study. Amateur case writers can first work on the eight pieces of the Case Jigsaw separately, then combine them to form their story. With this tool, the author helps case writers construct their case studies piece by piece, informed by the Case Roundel and Research Rhombus. This chapter contains specific examples related to the Case Jigsaw such as how to write the title, opening, context, characters, issues, incidents, tensions and closing.