Book 1 of the Wall of Fire Series.

Emery thought she was safe from the worst dangers the world had to offer (a ravaging pandemic). But what if the very thing that was meant to protect her is actually her biggest threat?
When Emery’s beloved brother falls victim to a strange and deadly disease, she risks everything to save him, illegally crossing the Wall of Fire that divides their city in search of the medicine that will save his life. However, she becomes and unwilling participant in the Burning-—a gauntlet of trials she must pass or be exiled forever.
Soon she meets up with Eason, a boy she’s secretly loved forever and never dreamed she’d see again. Suddenly, everything she thought she knew is thrown into question, and trusting the wrong person could mean the difference between life and death—not only for her brother, but for everyone Emery has ever known.
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