Whispering Stump. Series 3, #3

KJ and Izzy never expected Grandma's backyard to hold a secret. But when an old tree stump begins to glow, the boys are pulled into a magical underground world - one filled with glowing roots, mysterious creatures, and a powerful force called the Heartroot. When their Auntie disappears into the stump, it's up to KJ and Izzy to face their fears, follow the light, and rescue her from the shadows. With courage, teamwork, and a little help from the creatures below, the boys discover that even the smallest hearts can carry the biggest bravery.
This gentle adventure blends real-life family love with magical wonder, inviting young readers to believe in themselves, trust their instincts, and listen when the world whispers something special.