The book is divided into two parts: Part I consists of 6 chapters dealing with physical geology using Cape Ann as the example. Part II consists of 10 chapters describing the geology at 10 localities on Cape Ann. The intended audience includes the lay person, geology students, and professional geologists.

The granite industry began on Cape Ann with the first sale of a piece of Rockport granite, for use as a millstone, to a farmer in Newburyport in 1800. The industry would grow to include more than 60 quarries and operations around the cape, becoming the second-largest economic force in the area behind fishing. Hundreds were employed as quarrymen, stonecutters, paving cutters, and finishers. Cape Ann was particularly well fitted for the pursuit of granite as its rocky hills and shores afforded a comparatively inexhaustible source of supply, and its splendid shipping facilities gave the advantage of quick and economical transportation to market by sea and land. The industry eventually declined, and by 1930, most quarries had gone out of business because of labor strikes and low demand. Today, most of these quarries are filled with rainwater and springwater, and many are used as reservoirs for the surrounding communities.

The years that followed the bloody Great War, which divided the nation, up through the start of the twentieth century were a remarkable era of growth and prosperity for the towns and villages of Cape Ann. Swift-sailing schooners manned by hardy and able seamen from the fisheries of Gloucester ranged far out into the Atlantic. Millions of tons of granite laboriously cut from the bountiful quarries of Rockport were shipped to ports near and far. Essex shipyards, fueled by the demands of the Gloucester fisheries and the Rockport granite industries, turned out new and larger ships in even greater numbers. Tourism became a major industry, as dozens of the famous and grand North shore hotels were erected along the shores of Gloucester, Rockport, Magnolia, and Manchester-by-the-Sea. Coincidentally, the years from 1865 to the early twentieth century were a time when stereo photography and stereoscopic images, especially stereoview cards, enjoyed immense popularity. Cape Ann was fortunate to have several outstanding stereo photographers and publishers during this grand era, and they produced many excellent views of the Cape's natural wonders, its commercial activities, and the life and times of its industrious townspeople.