Flare is a science fiction novel by Roger Zelazny and Thomas Thurston Thomas, published in 1992.
Flare describes the world as it may be in 2081, and the effects a future inter-planetary civilization would suffer if a solar flare occurred after almost 100 years without any solar activity.
The book takes a scientific approach to the idea, including almost no tangible story line. It is broken into short segments which describe different people in various places suffering from the effects of the solar flare.