author
1890–1952
Best known as the name on lively early 20th-century girls' adventure stories, this "author" was actually a house-style pseudonym used on children's books connected with publisher Samuel E. Lowe. The name appears on titles such as Mary Lee the Red Cross Girl and several Camp Fire Girls novels.

by Helen Hart
Helen Hart was not a widely documented individual author. The name is best understood as a pseudonym associated with Samuel E. Lowe (1890–1952), a children's book writer and publisher whose work appears under both names in major library and public-domain catalogs.
Books credited to Helen Hart include Mary Lee the Red Cross Girl and Camp Fire Girls titles published in the 1910s and 1920s. Project Gutenberg and other library listings connect Helen Hart with Lowe's body of children's fiction, and reference works on the Camp Fire Girls series also identify Helen Hart as one of Lowe's pen names.
Because the historical record centers much more clearly on Samuel E. Lowe than on a separate person named Helen Hart, many personal biographical details about "Helen Hart" are uncertain. For readers, the most reliable takeaway is that the name belongs to a strand of brisk, wholesome juvenile fiction from the early 20th century, especially stories aimed at young girls and family reading.