Review: Hammer and Powder (Seven Brothers book 1) by Megan Derr

The Kingdom of Rinaha is all that stands between the violent, greedy Boorna and the rest of the continent, and they do so by way of their immense and heavily guarded Wall of Gamala, an enormous undertaking that runs the length of the southern end of the continent, standing strong for more than two hundred years.

Maintaining the Wall and the forces that guard it is an expensive undertaking, one that other countries are reluctant to contribute significantly to, despite the fact they benefit great...