TSI: The Gabon Virus is a medical novel written by Paul McCusker and Walt Larimore. It centers around an outbreak of ebola in Gabon, Africa. The outbreak nearly becomes a pandemic until the TSI medical team arrives on the job. Throughout the novel the military and TSI battle Return to Earth, a bio-terrorist group intent on destroying the Earth. Fantasy elements are included, especially with the ghostly Blue Monk. It is the first novel in an expected series about TSI.
The story begins with General Sam Moseley blowing up a top-secret lab in Greenland. Apparently, lethally mutated viruses had escaped confinement and killed almost all the scientists. The scene shifts to an isolated compound in Gabon, Africa, where a group of religious people have been killed by a virus. The only survivor, a little boy named Aaron, is somehow immune. Meanwhile, Moseley and his scientist friend Mark Carlson learn of the outbreak in Gabon and head there to investigate. (It so happens that the leader of the group was Moseley's son; Aaron is his grandson.) They recover two bodies for tests, then blow up the compound.
Aaron, hiding in the dense jungle, sees the explosion and thinks that the Tribulation has begun. Aaron flees to a pastor friend in the nearby village; the virus is accidentally passed on, and several police officers and the pastor die within minutes. Meanwhile, a medical company called Ahaz sends its men to study the virus. As the police officers and the pastor are dying, the men arrive and catch the disease. They, too, die speedily. Moseley finds out about the survivor and sends Carlson and his team to investigate. Mark chases the Ahaz team off. Moseley sends men to kill "the boy" having no idea of his identity. Eventually, Mark falls in with a special medical/bio-research team called the TSI (Time Scene Investigators) and enlists their help. After thrilling events and mysterious happenings, TSI manages to halt the virus and, for the time being, defeat Return to Earth.