Free Ebook: Plague Year by Jeff Carlson

As of now, Plague Year by Jeff Carlson is free to download from Amazon (ES, UK; not free on US, it seems). This is the book synopsis:

The nanotech was intended to save lives. Instead, it killed five billion people, devouring all warm-blooded lifeforms except on the highest mountain peaks.

The safe line is 10,000 feet. Below, there is only death. Above, there is famine and war. Mankind's final hope rests with a scientist aboard the International Space Station -- and with one man in California who gambles everything on a desperate mission into the ruins of the old world...