The Hybrids

Gordon Havers thought that he was the last man on Earth - after a virus killed off everybody else. So he lived on much as he had before the pandemic that wiped out humanity, eking out a living as a trapper in the Canadian Rockies. But one day, there is a knock on the door of Gordon's log cabin. And when he opens the door, he finds an attractive young woman on his doorstep to his infinite surprise.
So perhaps Gordon isn't the last living human being after all? And maybe there is still a future for the human race. There's only one problem. Joanna Creed isn't human.This is a novelette of 13400 words or approx. 45 print pages altogether.