Sullivan County New Hampshire genealogy is well represented on AccessGenealogy by the following books, histories, biographies and genealogies.
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- Merrimack and Sullivan Counties, New Hampshire Biographies
- History of Acworth New Hampshire
- History of Cornish New Hampshire
- Croydon New Hampshire Genealogy
- A history of the town of Sullivan New Hampshire 1777-1917
- Biography of George William Dunbar