Final notice : a novel
(Book)

The year is the very near future. A brilliant young doctor and mathematician, Vijay Patel, has invented a new health/sportwatch that monitors blood chemistry so accurately, it can actually predict when someone will die - within 10, 20, or 30 days. The intention of this "FinalNotice," as it is called, is to allow people to get their affairs in order and reach out to loved ones before it's too late. But when those notified have easy access to a gun, the result is sometimes lethal for more than just the watch-owner.