This genealogy book follows the descendants of John Summers of Maryland in a direct line to the author, with each receiving a chapter with sources. Others, from the main line and allied families are also investigated, with appropriate sources. There are outline descendant charts for the following: Summers, Roby, McDaniels, Harper, Cissell, Hammett, and Phelon. The Summers branch also has a kinship report, as does the Roby branch. The book is fully indexed.