The Shadow File

Read The Shadow File Storyline:

 America's intelligence security is in the hands of a million private contractors. Now one hacker may bring down their entire system.
Four months ago, Alex Vane's friend James Stacy was murdered by private security contractors working for the intelligence-industrial complex. Alex exposed the killers, but most of the system survived, including the amoral torturer known only as Amand.
From within Cuba's internet desert, James's widow Innerva Shah seeks her own kind of revenge. After quietly penetrating the system of contractors that run America's security, she's launching the largest ransomware attack in history, with the aim of burning that system to the ground.
But when Alex learns that Amand and his forces may be closing in on Innerva, he must make a desperate attempt to save her. With Innerva's surrender-or-die deadline only hours away, Alex finds himself in Cuba, threatened from every direction, and the only person he can count on is the wife he almost lost.
Note to the reader:
The Shadow File is Book 4 of the Alex Vane Media Thriller Series, but it can be read as a standalone. If you prefer to read a series in order, I recommend grabbing Books 1-3 in the boxed set: The Alex Vane Media Thrillers: 1-3. The boxed set leads right into The Shadow File, and it's the cheapest way to get Books 1-3. The whole series is also free through the Kindle Unlimited program.
Complete Series List (can be read as standalones or chronologically):
The Anonymous Source (An Alex Vane Media Thriller, Book 1)
The Inverted Pyramid (An Alex Vane Media Thriller, Book 2)
The Mockingbird Drive (An Alex Vane Media Thriller, Book 3)
The Shadow File (An Alex Vane Media Thriller, Book 4)