The Lost World: The Palumbra Chronicles: Book Four

The Resistance is broken.
Betrayed by someone they trusted and mourning everything they've lost, Maeve and her friends retreat to The Beyond to recover and decide what comes next. But when a mysterious ship descends from the sky, they learn everything they've been taught about their world is a lie.
Then Emery disappears.
Forced onto separate paths, the four friends battle on. Maeve searches for allies in a world thought to be lost forever. Gray fights to keep the remaining Resistance alive as government troops close in. Ginger and Tristan, searching for Emery, return to enemy territory.
Meanwhile, Emery has stumbled on the government's ultimate goal: enslaving the people of Palumbra and using a massive force field to trap them inside the city forever.
With time running out and danger closing in from every side, Maeve and her friends must reunite for one last fight. Because if they fail, Palumbra won't just lose its freedom. It will lose its future.

The thrilling conclusion to The Palumbra Chronicles. Perfect for fans of The Hunger Games and Divergent.