Sinisalo started her writing career writing science fiction and fantasy short stories. She has won several
Atorox Awards for her short stories. Her short story Baby Doll was nominated for the Nebula award in 2009. Sinisalo's first novel,
Ennen päivänlaskua ei voi (
Not Before Sundown, published in English in 2003) was published in 2000. The book has been translated to several language, The movie rights to the novel were acquired by
Carter Smith in 2006, but the project since fell through and the movie rights have been since been acquired by
Tuppence Middleton in 2022. Since her first novel, Sinisalo has written several novels including Linnunaivot (2008, published in English in 2010 titled Birdbrain), Enkelten verta (2011, published in English in 2014 titled The Blood of the Angels), and
Auringon ydin (2013, published in English in 2016 titled
The Core of the Sun). Her works have been translated to 20 languages. Sinisalo has worked as a screenwriter in several Finnish TV and radio productions. She also worked on the screenwriting team of
Iron Sky, a 2012
comic-science-fiction. The movie had the biggest budget of any production in Finnish film history at the time of its release. == Notable awards and honors ==