The book begins with a brief explanation of the book navigation. This is important because it describes, among other things, the pictograms that appear above each topic. The pictograms are intended to point out to the performers how many people it takes to perform each activity.
Introduction & Safety
There are introductory and safety notes before each chapter. These describe the possible sources of errors that can occur during execution and briefly and concisely point out generally useful facts of the respective topics