Dark World Books in Order

Seventeen-year-old Casey Smith's summer vacation becomes a struggle for survival after a storm washes her onto an unknown tropical island. Surrounded by creatures believed extinct, she and her companions must find a way to escape and return home.

Shipwrecked on what they believe is a tropical island, Casey, Jack, and Mike struggle to stay alive and return home. Their search for escape continues in an unfamiliar place whose dangers keep their ordinary lives out of reach.

Casey and Mike search for missing Jack across a landscape filled with dangerous creatures. Their journey leads to a glass city, where answers about the strange world around them challenge the assumptions that have guided their attempt to escape.

Casey and Mike board an alien mothership to rescue Jack and disable a weapon capable of destroying humanity. Their struggle for survival becomes a fight for Earth as vengeful aliens prepare to replace its human population.

Casey's fight reaches its final stage as she and Mike attempt to save Jack aboard a mothership. Stopping a weapon aimed at humanity becomes essential to protecting their loved ones from aliens intent on taking Earth for themselves.