Otis Adelbert Kline was an American songwriter, adventure novelist and literary agent during the pulp era. Much of his work first appeared in the magazine Weird Tales. Kline was an amateur orientalist and a student of Arabic, like his friend and sometime collaborator, E. Hoffmann Price.

Weird Tales is an American fantasy and horror fiction pulp magazine founded by J. C. Henneberger and J. M. Lansinger in late 1922. The first issue, dated March 1923, appeared on newsstands February 18. The first editor, Edwin Baird, printed early work by H. P. Lovecraft, Seabury Quinn, and Clark Ashton Smith, all of whom went on to be popular writers, but within a year, the magazine was in financial trouble. Henneberger sold his interest in the publisher, Rural Publishing Corporation, to Lansinger, and refinanced Weird Tales, with Farnsworth Wright as the new editor. The first issue to list Wright as editor was dated November 1924. The magazine was more successful under Wright, and despite occasional financial setbacks, it prospered over the next 15 years. Under Wright's control, the magazine lived up to its subtitle, "The Unique Magazine", and published a wide range of unusual fiction.