Nina Allan is a British writer of speculative fiction. She has published five collections of short stories, multiple novella-sized works, and five novels. Her stories have appeared in the magazines Interzone, Black Static and Crimewave and have been nominated for or won a number of awards, including the Grand prix de l'Imaginaire and the BSFA Award.

The Rift is a 2017 science fiction and literary fiction novel by English writer Nina Allan. It was first published in July 2017 in the United Kingdom as a trade paperback by Titan Books. It is the second book of a two-book deal Allan signed with Titan in 2015; the first is the second edition of her debut novel, The Race, published in 2016.