Folklore & Mythology:
* The History of Early Maine: A comprehensive work exploring the history of Maine from the earliest times to the 18th century.
* The Penobscot Man: A study of the Penobscot Indians, their culture, and their legends.
* The Indians of Maine: A detailed account of the various Indian tribes that lived in Maine, their history, and their culture.
* The Book of Indian Crafts and Indian Lore: A collection of information on traditional Native American crafts and stories.
* The Woodpeckers: A collection of Maine folk tales and legends.
* The Bird Book: A guide to the birds of Maine.
Poetry:
* A Maine Coast.
* Poems and Verses.
Other Works:
* The Autobiography of a Maine Woman: A personal account of her life in Maine.
* A Woman's Journey to Alaska: An account of her travels through Alaska.
* The Last of the Old-Time Maine Hunters: A tribute to the traditional hunting culture of Maine.
* The Old Shipmaster: A collection of stories about Maine's maritime history.
Eckstorm also contributed articles and essays to various journals and newspapers on a wide range of topics, including folklore, history, and nature. Her works are highly valued for their meticulous research, insightful observations, and engaging storytelling.