Emily Gerard was born in Scotland, the daughter of Archibald Gerard and Euphemia Erskine Robison (daughter of Sir John Robison).
She is sometimes referred to as Emily Gerard, Mrs de Laszowska, Emily Laszowska, or Emily de Laszowska Gerard, after her husband, Chevalier Mieczislas de Laszowski (Polish: Mieczysław Łaszowski), a Polish cavalry officer serving in the Austro-Hungarian Army. Twenty years her senior, they married in 1869. Her familiarity with Transylvanian folklore came about as a result of being stationed in the towns of Hermannstadt and Kronstadt where he was stationed from 1883 to 1885.
She reviewed German literature for the Times, having been educated in Tyrol. She spent much of her life in Austria, where she met and befriended Mark Twain, to whom The Extermination of Love (1901) is dedicated.
Her sister Dorothea (Gerard) Longard de Longgarde (1855–1915), who was arguably the more successful and certainly the more prolific novelist, also married an Austro-Hungarian officer and spent much of her life in Austria. Their novels were often set in Eastern Europe. The Gerard family also included at least two brothers, the Jesuit provincial Father John Gerard (1840–1912) and General Sir Montagu Gilbert Gerard (1843–1905), who made minor contributions to the siblings' collective literary output that eventually totaled nearly 60 books and novels. Both brothers were considered sufficiently noteworthy to be listed alongside Emily Gerard in Black's Who Was Who, 1897-1916 (1953).
- Reata; or What's in a Name, Edinburgh and London: William Blackwood and Sons, 1880.
- Beggar My Neighbour, Edinburgh and London: William Blackwood and Sons, 1882.
- The Waters of Hercules, Edinburgh and London: William Blackwood and Sons, 1885.
(these first three novels are all under the name "E.D. Gerard" - a collaborative pen name of Emily and her sister Dorothea Gerard)
- "Transylvanian Superstitions." The Nineteenth Century Vol.18, (1885) p. 128-144
- The Land Beyond the Forest: Facts, Figures, and Fancies from Transylvania, New York: Harper & Brothers, 1888.
- Bis, 1890
- A Secret Mission, 1891
- A Sensitive Plant, 1891. (as "E.D. Gerard" in collaboration with Dorothea Gerard.)
- The Voice of a Flower 1893
- A Foreigner, 1896.
- An Electric Shock, 1897.
- Tragedy of a Nose, 1898.
- The Extermination of Love: A Fragmentary Study in Erotics, Edinburgh and London: William Blackwood and Sons, 1901.
- The Heron's Tower, 1904.
- Honour's Glassy Bubble, A Story of Three Generations, 1906. (Posthumously published.)
Aside from the collaborations, she was most commonly identified as "E. Gerard" on the title pages of these works.
- Gmerek 2005
- Eccles 1899
- Reata; or What's in a Name Vol.1 (1880) William Blackwood and Sons, Edinburgh and London
- Reata; or What's in a Name Vol.2 (1880) William Blackwood and Sons, Edinburgh and London
- Reata; or What's in a Name Vol.3 (1880) William Blackwood and Sons, Edinburgh and London
- Beggar My Neighbor Vol.1 (1882) Blackwood
- Beggar My Neighbor Vol.2 (1882) Blackwood
- Beggar My Neighbor Vol.3 (1882) Blackwood
- The Waters of Hercules (1885) Blackwood
- The Nineteenth Century Vol. 18 (1885) Kegan, Paul, Trench & Company, London
- The Land Beyond the Forest: Facts, Figures, and Fancies from Transylvania (1888) Blackwood, U.K.
- A Secret Mission (1891) Harper & Brothers, New York
- The Voice of a Flower (1893) D. Appleton and Co., New York
- The Extermination of Love: A Fragmentary Study in Erotics Vol.1 (1901) Berhard Tauchnitz, Leipzig
- The Extermination of Love: A Fragmentary Study in Erotics Vol.2 (1901) Berhard Tauchnitz, Leipzig
- The Heron's Tower (1904) Methuen & Co., London
- Heiss, Lokke. "Madame Dracula: The Life of Emily Gerard." Journal of the Fantastic in the Arts, 10 (1999): 174-186.
- Black, Adam and Charles Black. Who Was Who, 1897-1916, 4th ed., v. 1, London: Adam and Charles Black,  1953: p. 270-271.
- Katarzyna Gmerek (2005). "Emily i Dorothea Gerard - nieznane pisarki szkockie w Polsce" (PDF). pp. X-4-c. Retrieved 2017-07-21.
- Eccles, Charlotte O'Conor (1899-02-21). "University of Notre Dame Archives Calendar". p. 13. Retrieved 2007-03-23.
- Michie, Christopher Young,The Practice of Forestry, Edinburgh and London: William Blackwood and Sons, 1888: p. 10 of Blackwood Catalog section.
- New General Catalog of Old Books and Authors
- Teuceanu, Radu, "Un Occidental Despre Transilvania: Jane Emily Gerard, The Land beyond the Forest, 1888." Brukenthal. Acta Musei, I. 1 (2006): 243-251.