An astonishingly bold and moving middle-grade debut about family, friendship and how it's OK to be different. "I loved this book . . . A female 'Wonder'." - reader review "This is a brilliant book. I don't think I've ever read anything like it." - reader review "A celebration of difference, a masterclass of empathy - just a massive warm hug of a book!" - reader review Libby wants to be a scientist when she grows up, just like her hero, the underrated astronomer Cecilia Payne. She'd also do anything for her family - and when her beloved big sister Nonny is in trouble, Libby comes up with the perfect plan to help her, and at the same time remind the world what stars are made of.