The Line Between Us. The Miami Front Series, #1

In a divided Miami, love may be the most dangerous side to choose. As civil war fractures the United States, Miami becomes a city of checkpoints, blackout zones, guarded towers, and secret escape routes. Isla Marquez has spent her life behind glass, protected by her father's power and the walls of the city's ruling class. But when her younger brother's medicine is trapped outside the protected zone, Isla does the one thing her father would never allow.
She goes looking for help. Caleb Rourke is a former Coast Guard rescuer turned smuggler, moving refugees, medicine, and secrets through Biscayne Bay after dark. He wants nothing to do with Isla Marquez, daughter of the man whose government controls the city he has learned to survive. But one sick boy, one stolen medical shipment, and one dangerous night pull Caleb and Isla into a conspiracy much larger than either of them expected.
The deeper they go, the more Isla discovers the truth about her father's world. Civilians are being sorted. Prisoners are being hidden. Families are being moved or abandoned based on usefulness. And the city's suffering is not just a result of war. It is part of a plan. As attraction turns into trust and trust becomes something neither of them can afford, Isla must choose between the family that raised her and the truth that could destroy them.
Caleb must decide whether loving her is worth becoming vulnerable in a war that uses love as leverage. When Miami goes dark, the line between loyalty and betrayal will be crossed. And neither of them will be able to go back.