Rachel Hartman is an American writer and artist of comics, and an author of young adult fiction. She is known for her books Seraphina (2012), Shadow Scale (2015), Tess of the Road (2018), and In the Serpent's Wake (2022).

Seraphina is a 2012 fantasy novel by Rachel Hartman and is her debut novel. The book was published on July 10, 2012, by Random House Publishing and was ranked at number 8 The New York Times Best Seller list in its first week of publication. Seraphina was awarded the 2013 William C. Morris Award for the best young adult work by a debut author. Foreign language rights to the novel have been sold in twenty languages, such as Spanish.A sequel entitled Shadow Scale came out in 2015,. A companion novel Tess of the Road set in the same milieu was published in 2018, followed by its own sequel, In the Serpent's Wake (2022).