Tiffany Jewell is a Black biracial American author. Her mother is white and an English immigrant to the United States; her father is Black. She has a twin sister, a husband, and two children. Jewell uses her own experience to inform her writing throughout This Book Is Anti-Racist. She often uses her own life as an example when explaining journal prompts, listing aspects of her own identity to inspire readers to create their own lists. She notes that like many people, some aspects of her identity afford her privilege (being cisgender and having light skin, for example), while others do not (being Black and biracial, being a woman, and so on). 

Jewell has spent much of her career working as an educator for children and families, especially in Montessori schools. She specializes in anti-racist and anti-bias education, aiming to make these important concepts accessible to younger generations. Jewell makes frequent references to other anti-racist works rather than relying exclusively on her own experiences. She acknowledges that she is always learning, just like everyone else. This Book Is Anti-Racist is Jewell’s debut book. She has since published The Antiracist Kid (2022) and is slated to publish a new book, Everything I Learned About Racism I Learned in School, in 2024.