Lian Tanner is an Australian children's author born on 17 March 1951 in Tasmania, Australia. She is well-known for her fantasy Keepers trilogy of children's books. The first book in the series, Museum of Thieves, was published in 2010 and has been translated into numerous languages, including German, Turkish, Chinese, Bahasa Indonesia, Thai, Brazilian Portuguese, Spanish, Ukrainian, Russian, and Bulgarian.

Before venturing into writing fiction, Tanner held various jobs, such as a teacher in Australia and Papua New Guinea. She has also worked as a journalist, editor, and actor. In the 1970s and 80s, she was part of the feminist folk band The Ovarian Sisters.

Her bestselling fantasy series The Keepers won two Aurealis Awards for Best Australian Children's Fantasy and has been translated into eleven languages. Her second series, The Hidden, has been published in Australia/New Zealand and North America. Tanner's third series, The Rogues, is set in the same world as The Keepers and has also been translated into Spanish.

Lian Tanner enjoys secrets, old bones, and animals that are not what they seem. She currently resides by the beach in southern Tasmania.