THE MOSSHEART’S PROMISE.

Out now wherever books are sold!
US EDITION
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Kirkus Starred Review
Publisher’s Weekly Starred Review
A Kirkus Best Middlegrade of 2023
A Chicago Public Library Best Middlegrade of 2023

When 12-year-old Ary Mossheart sets out to find a cure for the mold eating her mother alive, she makes a horrifying discovery: her entire world is actually trapped inside of a giant, rotting terrarium, one they were meant to leave 100 years ago. Now, Ary has only five days to find the exit — or they’ll be trapped forever. a middlegrade fantasy perfect for fans of Gregor the Overlander, The City Of Ember and The Girl Who Drank The Moon.

Praise for The Mossheart’s Promise:

Mix’s straightforward, magic-laced writing doesn’t shy away from hard but age-appropriately addressed truths of poverty, privilege, and natural disasters… A wonderful story for all the scared people doing the right thing because nobody else will. - Kirkus, Starred Review

Boasting rich, confident worldbuilding and complex interspecies relations in a starkly rendered setting, this stirring middle grade debut from Mix (The Ones We Burn) passionately explores the courage it takes to lead with empathy and to become a hero in the face of older generations’ failures. - Publisher’s Weekly, Starred Review