The Lazarus Protocol. Division Zero Special Ops, #1

A suspicious death in Washington, ruled an accident. A team dispatched into hostile territory. A covert agent, bruised and hunted, but very much alive. The CIA saved Stephanie-Jo's life. Now she owes them her soul, and there's no way out. When a private black-ops team becomes her only chance at survival, the mission shifts to a battle of wills. These men answer to no government, only to each other, and they're hunting the same device she's been sent to secure.
Steph's handlers don't accept failure. She has to complete the mission-or die trying. Adam Helton was declared dead by the Army years ago. Now he leads a team racing the clock to retrieve sensitive technology from a hostile zone, unaware of what will be unleashed if they fail. He's always risked everything, but this time the stakes are different. Caught between the loyalty he lives by and the oath he swore a long time ago, Adam must risk it all if any of them are going to make it out intact.
With a ruthless group of true believers closing in and an enemy who always seems one step ahead, Division Zero faces its greatest test yet. Every thread they pull in this global conspiracy only reveals another, placing them squarely in the crosshairs as they race to stop an ally from making a catastrophic mistake. The greatest threat isn't always the one coming for you. Sometimes it's the one standing beside you.*The new action-packed espionage thriller series from Lisa Phillips features a deadly conspiracy that stretches across the whole series, plenty of threads to keep you reading late into the night, and happily ever afters in each book.*