He'd been leading a secret life for years. But Thad Kendall got quite the surprise upon his return home-a child he'd never known about. The spy had left Caroline Emerson for her own good, never realizing she'd been carrying his baby and had raised his son alone. Now that was all going to change. Caroline knew Thad had returned to solve the mystery of his parents' murder-not to rekindle their romance. But she never dreamed that having the only man she'd ever loved back in her life would put her and their son in grave danger. For now they'd become the targets of the Christmas Eve killer.