At each stage of the text, the reader is aware of the informational progress made—i.e., what information has come before and what information remains to complete the progression. The primary documents that serve as sources of information are identified and weighted. A helpful time line from 1632 to 2016 provides an unexpected historical background. Due to the overall superior quality of this work, it is most highly recommended for all readership levels. Summing Up: Highly recommended. All readers.