Book: "Kalifornia Blu" by Kendall Shaffer. JasperLark Press. ISBN: 978-1939980021 Credited as Billie O'Connell, appears as the voice of the main character Kalifornia Blu in the video trailer of the book. The song "Superhero" is performed by her brother Finneas with his band The Slightlys and her mom Maggie Baird appears as the character The Judge.
Billie was named after her maternal grandfather, William Norton "Bill" Baird, who died before she was born. Her middle name, Eilish is the Irish form of Elizabeth. Pirate came from her brother Finneas because he really wanted her to be named that, Baird is her mother's maiden name and O'Connell is her paternal family surname. Originally, she was going to be named Eilish Pirate O'Connell.
