New book just published!

Time Coda at Amazon.com

2061: Halley’s comet collides with the Earth, and a massive extinction is underway. From a bomb shelter near San Antonio, Texas, four people emerge and begin a journey to find somewhere on Earth they can survive the desolation. Some lucky Earthlings have already escaped to start a colony at the Hellas Planitia on Mars, but is their luck starting to run out? 1963, Elmira, New York: a veteran time traveler is surprised to find a time machine materializing on his driveway. Past experiences have taught him about the dangers of changing history, but recent events prompt him to take the risk of saving a certain life, if only he can learn how to operate the machine. Realities for each of the players in our drama intersect at junctures within the multiverse. History will fold and unfold before their eyes. Will they change history, or will history change them?