New York Times-bestselling author Dhonielle Clayton makes her middle-grade debut with a fantasy adventure set in a global magic school in the sky, perfect for fans of Rick Riordan, Soman Chainani, and Philip Pullman.

The Marvellers deserves the highest compliment I can give a book: I want to live in this world. --Rick Riordan, #1 New York Times bestselling-author

A marvelous gift of a novel! With fantastical twists at every turn, Clayton has created a world that readers won't want to leave." --Angie Thomas, #1 New York Times-bestselling author of The Hate U Give and Concrete Rose

"The Marvellers is a rich, enchanted melting pot of magic, thrills, and color . . . filled with heart, wit, and humor. A tantalizing introduction to an exhilarating fantasy universe." --Soman Chainani, New York Times-bestselling author of The School for Good and Evil series

Eleven-year-old Ella Durand is the first Conjuror to attend the Arcanum Training Institute, a magic school in the clouds where Marvellers from around the world practice their cultural arts, like brewing Indian spice elixirs and bartering with pesky Irish pixies.

Despite her excitement, Ella discovers that being the first isn't easy--some Marvellers mistrust her magic, which they deem "bad and unnatural." But eventually, she finds friends in elixirs teacher, Masterji Thakur, and fellow misfits Brigit, a girl who hates magic, and Jason, a boy with a fondness for magical creatures.

When a dangerous criminal known as the Ace of Anarchy escapes prison, supposedly with a Conjuror's aid, tensions grow in the Marvellian world and Ella becomes the target of suspicion. Worse, Masterji Thakur mysteriously disappears while away on a research trip. With the help of her friends and her own growing powers, Ella must find a way to clear her family's name and track down her mentor before it's too late.