Fighting back and destroying alien ships has grave consequences. Earth faces its ultimate destruction, unless bitter enemies can work together. Earth is recovering after Charlie and his group managed to stamp out the immediate alien threat. Now, Denver and his team, stationed in a liberated croatoan farm, plan to restore humanity as the dominant force. But when shocking information comes to light, they set off on an immediate mission north. The team encounter a hybrid city, where humans and croatoans live and work together. It's here in this strange new civilisation that Denver discovers there's a bigger threat to the planet than the aliens already on the surface: something far more terrible is coming, and it's a race against the clock to save every survivor from the impending onslaught. Critical Path is the republished exciting sequel to Critical Dawn.