As you can tell from the title, This Immortal is about an immortal. The Earth is in bad shape after a three day nuclear exchange and most people have fled Earth for Vega where they are second class citizens. Conrad, the immortal of the title, is tasked with escorting a Vegan on a tour of various Earth ruins, accompanied by several other people, most of which want the Vegan dead and the Earthlings on Vega to come home.
Despite the length of time it took me to read this, I liked it a lot. The characters were interesting, especially Conrad and Hasan, the assassin tasked with killing the Vegan. The odd relationship beween Conrad and Hasan was probably my favorite part of the book. The ending was also a surprise, which is the highest honor I give a book these days.