Hollow Earth / Matt and Emily Calder

Beneath the surface of their seemingly ordinary town, Matt and Emily Calder stumble upon a hidden portal that transports them into the shimmering, labyrinthine depths of the Hollow Earth. As they navigate a world filled with glowing crystals, ancient ruins, and strange creatures, they uncover a long-forgotten conflict that echoes from the depths. Their journey is fraught with danger—from shadowy predators to riddles that threaten to trap them forever. Driven by a desire to understand this subterranean realm and find a way back, they forge alliances with unlikely allies, each step revealing the true extent of their resilience and the importance of their bond.

'Hollow Earth / Matt and Emily Calder' stands as a notable work within Carole E. Barrowman's bibliography, showcasing her distinctive blend of adventurous storytelling and imaginative worldbuilding. While it has not garnered major awards, it is praised for its inventive premise and engaging characters, resonating well with its target audience of young adults. Critics highlight its dynamic pacing and vivid prose, though some note that its plot can occasionally follow familiar trope patterns. Overall, the series is regarded as a solid addition to contemporary fantasy, especially appreciated by readers looking for a thrilling, character-driven adventure.