The Altreian Enigma

After thwarting an alien invasion in the past, Mark and Heather Smythe find themselves at the center of a new threat as extraterrestrial contact efforts bring the Kasari back with hidden agendas. Alongside allies including a CIA mercenary, they race to prevent the planet from falling under alien rule, facing battles across both Earth and distant worlds. As the danger intensifies, an ancient artifact on Earth hints at a looming catastrophe that could unleash ancient evil from another realm.