Forged in Ember by Trish McCallan

In the final novel in the scorching Red-Hot SEALs series, a desperate mother and a Navy SEAL fight fire with fire to protect their love and save the world…

Amy Chastain has made a lot of enemies—none so ruthless as the insanely powerful New Ruling Order (NRO). When they killed her husband, it was hell. Then they targeted her children by injecting them with a dangerous, experimental isotope. Now Amy trusts only one man to help her: the ex-commander of SEAL Team 7.
In the company of Navy SEALs, Jace “Mac” Mackenzie was in his physical element. Now he’s on the run from the same cabal that poisoned Amy’s children. That doesn’t stop him from launching a mission to bring down the NRO—and find an antidote. But the clock is ticking. And as the sparks fly between him and Amy, Mac realizes he has more to lose than ever before.

As Mac closes in on the NRO, he uncovers a plot that threatens more than Amy’s children. Now it’s a race against time to stop a global conspiracy, save the woman he loves, and protect the family that’s starting to feel like his.