Novels
- Cat-Dancer Chronicles
- The Cat Who Lived Forever (2003)
- The Cat Who Played Chess (2004)
- The Cat Who Played Rachmaninoff (2005)
- The Cat Who Sang for the Birds (2006)
- The Cat Who Taught the Dogs to Read (2007)
- The Cat Who Went to the Stars (2008)
- The Cat Who Saw Angels (2009)
- The Cat Who Flew the Broomstick (2009)
- The Cat Who Learned to Yodel (2010)
- The Cat Who Lost His Santa Hat (2011)
- The House on the Pond series
- The House on the Pond (2011)
- The Secret Garden (2012)
- The Wishing Tree (2012)
- The Magic Mirror (2013)
- The Enchanted Forest (2013)
- The Crystal Cavern (2014)
- The Lady Trent series
- A Natural History of Dragons (2003)
- The Well-Dressed Crocodile (2005)
- The Unnatural Inquirer (2007)
- In the Courts of the Crimson Kings (2010)
- Into the Serpent's Mouth (2012)
- The Tropic of Serpents (2014)
- The Eye of the Labyrinth (2016)
- The Daughter of the Deep (2017)
- The Whispering Shadows series
- Whispering Shadows (2014)
- Into the Shadows (2015)
- Out of the Shadows (2016)
- The Winterhouse Books
- The Girl Who Drank the Moon (2016)
- The Boy Who Swapped His Shadow (2017)
- The Girl Who Drank the Stars (2017)
- The Boy Who Steals Houses (2018)
- The Girl Who Ate the Sun (2019)
- The Boy Who Swallowed the Sea (2020)
- The Girl Who Wrote in Silk (2022)
- Stand-alone novels
- The Mermaid's Mirror (2002)
- Shadow of the Dragon (2003)
- The Lost Princess (2004)
- The Witch's Daughter (2006)
- The Snow Princess (2008)
- The Firebird (2009)
- The Ice Maiden (2011)
- The Rose Bride (2013)
- The Glass Queen (2014)
- The Gilded King (2016)