The Traitor Queen (Bridge Kingdom 2)

A queen now in exile as a traitor, Lara has watched as Ithicana is conquered by her own father, helpless to do anything to stop the destruction. But when she learns her husband, Aren, has been captured in battle, Lara knows there is only one reason her father is keeping him alive: as bait for his traitorous daughter.

And it is bait she fully intends to take.
 
Risking her life on the Tempest Seas, Lara returns to Ithicana with a plan not only to free its king but to liberate the Bridge Kingdom from her father’s clutches, using his own weapons: the sisters whose lives she spared. Yet not only is the palace inescapable, there are more players in the game than Lara ever realized: enemies and allies switching sides in the fight for crowns, kingdoms, and bridges. But her greatest adversary of all might be the man she’s trying to free—the husband she betrayed.

With everything she loves in jeopardy, Lara must decide who—and what—she is fighting for: her kingdom, her husband, or herself.