This is an ACE of ASIN:B0748WCBYS Letters From Jack A highly-rated, slow-burn thriller. Dr. Jack Hansen makes a dangerous cross-country trip to a medical research institute. Most of the world's population is infected with a virus that leaves them barely alive but extremely dangerous. Cities are overrun and uninhabitable. Vastly outnumbered, survivors have retreated to fortified compounds and small towns, like the one Jack is from. But a new treatment promises hope, and Jack is assigned to help with the research. Jack soon learns that his challenges lie less with the patients, than with his fellow staff. Many of them disagree with the government's plan to contain and treat the infected, and would rather kill them on sight. Jack wants to do the right thing - stay and complete his two-year assignment, but his ongoing struggles lead him to contemplate quitting and returning home.