The Ice Prisoner — Logan Byrne

After winning the tournament and going home to her family, Alexia finally feels safe, like everything will be fine. She and Liam stopped the tournament from ever happening again, and even though they couldn't stop all the people before them from going through it, nobody else ever will again. Alexia's life looks like it's finally going back to normal.

It's only when she and Liam are out one day, enjoying their hard-won freedom, that she finds out the government has other plans for them, and won't let them get away with squandering their plans for domination. When Alexia and Liam are arrested and taken to a remote high-security prison where they're forced to do backbreaking manual labor like breaking rocks for hours every day, they meet some unexpected new friends and are offered a chance to escape. And they decide to take it.

To stop the government from continuing its heinous abuses of its citizens, they learn about a place where all the government's secrets are held -- but it's far from easy to get to. They must go back into the grid, but this time into an unforgiving icy wasteland that is both heavily guarded and entirely inhospitable. There, they'll find the secrets that will help them take down the government -- but only if they can survive.

This is the second book in a planned trilogy.