Mercedes Abad debuted as a writer with Ligeros libertinajes sabaticos (Light Sabbatical Libertinage, 1986), a book of short stories which was awarded the Premio La Sonrisa Vertical. She has published the short story books Felicidades conyugales (Marital Happiness), Soplando al viento (Blowing in the Wind, 1995), Amigos y fantasmas (Friends and Ghosts, 2004), winner of the NH Vargas Llosa Award, Media docena de robos y un par de mentiras (Half a Dozen Heists and a Couple of Lies, 2009), La niña gorda (The Fat Child, 2014) and Casa en venta (House for Sale, 2020).
She is also the author of the novels Sangre (Blood, 2000), El vecino de abajo (Downstairs’ Neighbour, 2007) and the essay Solo dime donde lo hacemos (Just Tell where can we do it, 1991).
She has also written radio and theater scripts such as Pretèrit perfecte (Present Perfect), Se non è vero (If it’s not True) and Bunyols de Quaresma (Lent Fritters). She has staged Dangerous Liaisons by Christopher Hampton, and has collaborated in the playwriting of the show XXX with the adaptation of Philosophy in the Bedroom, by the Marquis de Sade, produced by La Fura dels Baus. She regularly writes in a number of news media outlets. Her write-ups in the supplement Catalonia of El País have been compiled into the volume Titúlate Tú (Name Yourself, 2002). Her work has been translated into several languages.