The Impossible Fortress

Gabriel returns for his fourth year at Crookhaven, and it's his most challenging one yet. Along with mastering a new class called Lay of the Land, this year's Break-in is set in a perilous distant location known as the Impossible Fortress.
The crew must put everything they've learned to the test outside of the school gates. But the real world can be a dark and dangerous place, and Crookhaven may not always be able to protect them...