When siblings Leo and Elara Hawthorne visit their eccentric grandfather for the summer, they expect strange inventions and overgrown gardens—but not a magical well hidden beneath the vines.

One mysterious fall later, they find themselves in The Underdeep, a fantastical world beneath the earth filled with glowing forests, time-twisting tunnels, memory-swamps, and cities made of glass. Guided by a sly talking fox named Ash, Leo must summon his bravery, and Elara her cleverness, as they face riddles, illusions, and trials that challenge not just their courage—but who they truly are.

To return home, they must collect five magical artifacts, unlock the secrets their grandfather never told them, and discover the greatest truth of all:

The magic was never just in the world... it was in them all along.

A heartwarming, wonder-filled journey about courage, identity, and the threads that bind us, The Secret of the Silver Well is perfect for fans of The Chronicles of Narnia, Nevermoor, and The Spiderwick Chronicles.