The Bridge Kingdom (The Bridge Kingdom 1) by Danielle L. Jensen

A warrior princess sent as a bride… with a mission to destroy the kingdom from the inside. The Bridge Kingdom is sizzling romantasy with sharp political stakes, a marriage built on deception, and a heroine forced to decide whether she’s the hero—or the villain—in a war over the one thing everyone needs to survive.

Lara has been trained in isolation with two certainties: King Aren of Ithicana is her enemy, and she will be the one to bring him to his knees. Ithicana controls the only route through a storm-ravaged world, enriching itself and starving its rivals—including Lara’s homeland. So when Lara is sent to Ithicana as a bride under the guise of peace, she’s prepared to fracture its impenetrable defenses… and the defenses of its king.

As Lara begins to understand the war to possess the bridge—and her feelings for Aren turn from icy hostility to fierce passion—she’ll have to choose which kingdom to save… and which to destroy.

1. The Bridge Kingdom
2. The Traitor Queen 
3. The Inadequate Heir
4. The Endless War
5. The Twisted Throne
6. The Tempest Blade