These are links to free, online Dukes County histories and city and town histories for cities and towns within Dukes County, Massachusetts.*
County Histories generally give information on the settlement of an area, geography, government, and industry in an area, and sometimes include biographical sketches of citizens or other information about the local residents. Some even include genealogies.
Martha’s Vineyard – volume 3 exists
Papers relating to the island of Nantucket, with documents relating to the original settlement of that island, Martha’s Vineyard, and other islands adjacent, known as Dukes County, while under the colony of New York. Comp. from official records in the office of the Secretary of State at Albany, New York;, by Franklin Hough
Records of the town of Tisbury, Massachusetts, 1669-1864, published 1903