You should also check out the Early Maryland bibliography page, as relations (both friendly and hostile) between Native groups and white colonists are sometimes covered in detail.
Clark, Wayne and Helen C. Rountree. “The Powhatans and the Maryland Mainland.” In Helen C. Rountree’s Powhatan Foreign Relations 1500-1722. Charlottesville: UP of Virginia, 1993. Here’s a glimpse at the Maryland Natives, from across the river in Virginia. See Helen Rountree, below, for a comprehensive introduction to the Powhatans.
Clark, Wayne. The Algonquian-Speaking Indians of Maryland. Captain John Smith Chesapeake National Historic Trail. A brief introduction.
Fausz, J. Frederick. “Merging and Emerging Worlds: Anglo-Indian Interest Groups and the Development of the Seventeenth-Century Chesapeake.” In Colonial Chesapeake Society, edited by Lois Green Carr, Philip D. Morgan and Jean B. Russo. Chapel Hill: University of North Carolina Press, 1988. pp 47-98.
Fausz, Frederick J. “Patterns of Anglo-Indian Aggression and Accommodation along the Mid-Atlantic Coast, 1584-1634.” In William W. Fitzhugh’s Cultures in Contact: The European Impact on Native Cultural Institutions in Eastern North America, A.D. 1000-1800. Washington: Smithsonian Institution, 1985. pp 225-268.
Jefferson Patterson Park & Museum: American Indians. A brief introduction. The park includes excavations of native home sites.
Jennings, Francis. “Indians and Frontiers in Seventeenth Century Maryland.” In Early Maryland in a Wider World, edited by David B. Quinn. Detroit: Wayne State University Press, 1982. pp 216-241.
Jennings, Francis. The Invasion of America: Indians, Colonialism, and the Cant of Conquest. New York: WW Norton, 1976. If you read only one book about European arrival on the east coast, read this one…though it has one curious flaw: though careful and accurate in other terminology, Jennings consistently refers to Scotsmen as Englishmen.
Lurie, Nancy Oestreich. “Indian Cultural Adjustment to European Civilization.” In Seventeenth Century America: Essays in Colonial History, edited by James Morton Smith. Chapel Hill: UNC, 1959. 33-60.
MacLeod, William Christie. “Celt and Indian: Britain’s Old World Frontier in Relation to the New.” Beyond the Frontier: Social Process and Cultural Change, edited by Paul Bohannan & Fred Plog. Garden City: Natural History Press, 1967. 22-41. Deals with a later period and a different state, but does provide insight into mutual cultural change.
Piscataway Indians, Cedarville Band. Their museum, open seasonally, is in Waldorf, Maryland.
Piscataway Nation & Tayac Territory. This group offers a speakers’ bureau.
Rountree, Helen C. The Powhatan Indians of Virginia: Their Traditional Culture. Norman: U Oklahoma, 1989. The Piscataways, Patuxents, Yoacamacoas, and other Maryland groups were not at all identical to the Powhatans, who comprised a much larger and more powerful culture. Still, this book give a good account of the general conditions, lifeways, and economies of the region.
Thornton, Russell. American Indian Holocaust and Survival: A Population History since 1492. Norman: University of Oklahoma Press, 1987. Demographics and eye-witness accounts of the 90% reduction in Native American populations that occurred after European invasion.