Aila Johanna Sinisalo is a Finnish science fiction and fantasy writer.

[2] Professionally she worked in the advertising business, rising to the level of marketing designer.

Sinisalo was awarded the Finlandia Prize for literature in 2000 for her first novel, Ennen päivänlaskua ei voi (translated as Not Before Sundown in 2003 and again as Troll — A Love Story in 2004 for the American market).

She has named the 1967 novel Friday, or, The Other Island by French writer Michel Tournier as a major influence on her career.

[2] She is also the screenwriter of Energia Productions Iron Sky movie, a sci-fi comedy set in 2018.