An underground city. A deadly project. And an Intelligence agent who can help Jossey take down the City...if she can trust him again.

Jossey grew up believing the Onlar, creatures of the aboveground, were monsters. But when they kidnapped her, she found out terrible secrets about her city and her family. Her choice to help the Onlar against the City almost cost her her life. And the Intelligence agent she'd thought was her friend was the one tasked with carrying out her execution.

But he didn't quite succeed.

Now Jossey, barely alive, has been sent to the Onlar by a mysterious figure from the City. And time is of the essence - her solar network project could mean disaster not only for the Onlar, but for thousands of citizens as well. She can't do much from the Onlar camp, but Gavin, Jossey's Patrol leader and longtime friend, isn't convinced she's dead. And Patrol has started to learn the truth.

As tentative alliances form, Jossey begins to think this might be easier than she'd thought. But a terrible miscalculation has been made, one that may cost her and her friends both the City and their lives. Can she see it before it's too late?

Aestus is an adult dystopian science-fiction series set centuries after climate change has ravaged much of Earth. An epic story of vengeance, power, shifting loyalties, and survival that looks at just how far people will go to protect what they love, brought to you by science writer S.Z. Attwell, Aestus paints a picture of a world in which far too little has changed.