* The Ballad of the Sad Cafe (2009) - a retelling of the classic novella by Carson McCullers
* The Nightingale's Song (2010) - a historical novel set in the American Civil War
* The Magical Christmas of Mr. C.L.D. Claus (2011) - a humorous, heartwarming Christmas story
* The Princess and the Pony (2012) - a charming story about a princess who prefers ponies to princesses
* The Story of the Three Little Pigs: A New Tale (2013) - a reimagining of the classic fairy tale
* The Very Best of the Very Worst (2015) - a hilarious story about a girl who is the worst at everything
* The Ghosts of Maplewood Manor (2016) - a spooky, suspenseful story about a haunted house
* The Truth About Fairies (2017) - a story about a girl who discovers that fairies are real
* The Princess Who Saved Herself (2018) - a feminist fairytale
* The Magic Thief (2019) - a fantasy adventure novel
* The Last Cuentista (2021) - a young adult novel set in a post-apocalyptic world
These are just some of the many books that Katherine Hannigan has written. Her work is known for its humor, heart, and creativity.