Hélène Adeline Guerber (1859–1929), also known as H.A. Guerber, was an American author of many books, most of which were lively retellings of myths, legends, folklore, plays, epic poetry, operas and history. She was also a teacher.

Although several books by Guerber are still in print, details about her life are scant. There are entries for her in three or four biographical sources from the early 1900s, but apart from listing the books she wrote, these sources provide almost no facts about her life. These book sources are supplemented by two short death notices, six Census records (five federal and the 1892 New York state). Even the scant information is sometimes conflicting. Although Hélène Guerber published over two dozen books in her lifetime, as a person she is almost forgotten.