Elizabeth and her Extra X is a children's book for kids with Triple X or Trisomy X syndrome (47, XXX). This book helps children and adolescents with Triple X understand their condition. The story follows Elizabeth, a young girl with Triple X, through her busy day as she attends school, goes to golf practice and has a doctor's appointment. The story explores the genetics of Triple X and addresses social, academic and medical aspects of this condition in an age-appropriate, fun way. Though Elizabeth's condition presents her with many challenges throughout the story, she is able to work through each challenge in her own way. Girls with Triple X will identify with and learn from Elizabeth as they read this book.