Covert Christmas Twin by Heather Woodhaven

To save her sister, she’ll need to become her.

After discovering she’s a twin, FBI special agent Kendra Parker tracks down her birth mother — and faces a barrage of bullets. Now armed with the knowledge that her mother’s a spy, Kendra must go undercover as her sister to protect her family. But can she and FBI analyst Joe Rose expose a government mole…before they all end up dead?