Stephanie Jane Merritt (born 1974 in Surrey) is an English critic and feature writer who has contributed to various publications including The Times, the Daily Telegraph, the New Statesman, New Humanist and Die Welt. She was Deputy Literary Editor of The Observer from 1998 to 2005 and currently writes for The Observer and The Guardian, in addition to writing novels.
Merritt's first novel Gaveston (Faber & Faber) won a Betty Trask Award from the Society of Authors in 2002. Her second novel was Real (2005), about a struggling young playwright, for which she was also commissioned to write the screenplay. In 2010, Heresy was published, her first novel in the series of historical fiction thrillers featuring Giordano Bruno, under the pseudonym S. J. Parris.  It was followed by Prophecy (2011) and Sacrilege (2012). The fourth novel in the series is called Treachery and was published on 27 February 2014.
Merritt has appeared regularly as a critic and panellist on BBC Radio 4 and BBC7, has been a judge for the Costa Biography Award and the Orange New Writing Award as well as the Perrier Award, and is a regular interviewer and author at various literary festivals, as well as the National Theatre. During 2007 and 2008 she curated the Talks and Debates programme on issues in contemporary arts and politics at London's Soho Theatre.
- Gaveston (2002)
- Real (2005)
- The Devil Within (2009)
- Giordano Bruno Series
- Heresy (2010)
- Prophecy (2011)
- Sacrilege (2012)
- Treachery (2014)
- Faber and Faber: author profile: Stephanie Merritt
- The Guardian: profile Stephanie Merritt
- "Stephanie Merritt". Newsnight review (BBC News). 20 October 2005.
- The Washington Post: book review: Heresy, 27 February 2010.
- Seattle Pi: critical book review: Heresy, 6 June 2011.
- Trachery cover art and synopsis, 3 October 2013.
- Stephanie Merritt, The Devil Within: A Memoir of Depression (2009)
- The Guardian: Stephanie Merritt, My time in therapy, 7 March 2009.
- Curtis Brown: author profile: Stephanie Merritt, UK.