The chapters of Part III detail the tools you need to be familiar with in order to get the most from your assemblies. Of these, Chapters 12 and 16 are my favorites. These are loaded with best-practice suggestions and tips for efficient workflow. Chapter 16, the in-context chapter, is particularly important for SolidWorks users from many different fields who need or want to make parametric relations between parts. A lot of erroneous information floats around the SolidWorks community on this topic, and this chapter will help you cull the reliable information.