Trapped in the Hollow Earth Books in Order

Seventeen-year-old Casey Smith anticipates a summer vacation and a possible romance with Mike. A freak storm throws her into the sea, leaving her stranded on a mysterious tropical island that appears on none of the maps she knows.

Casey Smith’s summer vacation turns into a survival ordeal after a storm washes her onto an unfamiliar tropical island. Far from the normal life and romance she anticipated, she must confront a place whose location she cannot explain.

Casey and Mike cross a jungle filled with dangerous creatures to reach a glass city. Hoping to find help for their abducted friend Jack, they instead encounter revelations that complicate the rescue and alter their understanding of their predicament.

Marooned far from home, Casey and Mike seek assistance in a glass city after crossing a creature-filled jungle. Their friend Jack remains abducted, and the information they discover makes rescuing him more difficult than they had expected.

With Jack abducted, Casey and Mike face increasingly dangerous creatures while seeking a way to recover their friend. An unexpected giant offers assistance and a possible route to a city, but surviving the journey demands cooperation.

Shipwrecked in a place she cannot explain, Casey Smith faces a struggle to remain alive. This continuation of her castaway adventure follows the challenge of surviving far from familiar surroundings, with no clear route back to the life she knew.