The battle for Crystal Castle : the thirteenth adventure in the Kingdom of Fantasy / Geronimo Stilton ; cover by Danilo Barozzi [and 2 others] ; illustrations by Silvia Bigolin [and 4 others] ; translated by Julia Heim.
The Harmony Stone has been stolen from the Crystal Castle, and without it the Kingdom of Fantasy is vulnerable to an ancient enemy, The Invisible Army; Geronimo, together with Queen Blossom's daughter, Winglet, embarks on a mission to find the ancient crown which will defeat the Invisible Army and restore harmony to the empire--but they must make it back to the Crystal Castle before it is overwhelmed by the enemy.
Series:
Kingdom of fantasy ; 13 Stilton, Geronimo. Kingdom of Fantasy ; 13.
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