Three years have passed since a man-made virus targeting O negative blood created a new divergent species of humans, the Colicians. Now, further attempts at genetic engineering have created a new virus, the Caiten Strain, which targets those with A negative blood. As more and more people are infected in a laboratory experiment gone out of control, Austin Rockwell and Miriam Lobner attempt to flee the experimentation and start a new life together. They both learn they must make personal sacrifices for a cause greater than themselves: to protect their friends and family, and to make the world safer and more peaceful for everyone.A Negative continues the intriguing storyline introduced in Cassandra Lynn King's novel Parallels and its sequel, O Negative.Coming Soon . . . part 4 of the Parallels series: 2048 A.D.