Ada Castells Ferrer or Ada Castells (born 28 November 1968) is a Catalan professor, writer and journalist.

Her first novel El dit de l'àngel involved her Protestant ancestors.

[2] In 2004, her novel about the German painter Caspar David Friedrich, "Tota La Vida", was published.

[2] Her 2012 book Pura Sang (Pure Blood) was set in Minorca[4] and it won the 32nd Premi Sant Joan Unnim for Catalan literature.

[5] Her 2019 novel "Mare" involves the differing memories of a woman and her daughter.