The Dying Time: Impact Book One in The Dying Time series
Raymond Dean White
This book can be downloaded and read in iBooks on your Mac or iOS device.
Imagine being a thousand miles from the impact site and being almost deafened by the sound and seeing buildings flattened by the shock wave. You are thrown off your feet by jolting earthquakes that peg the Richter scale, nearly burned to death by fire falls--think rain showers but with magma--and if you live along a coastline (or likely anywhere within several hours drive) you'll be swept away by tsunamis large as mountains. And those are just the immediate effects. Follow them with Impact Winter that lasts for years, plagues, starvation and having to defend your family against those who would murder, enslave, or eat them and you have an inkling of what Michael and Ellen Whitebear must endure to survive and begin rebuilding.
Preppers and Fans of The Stand, Lucifer's Hammer, The Postman, Swan Song, or Patriots: Surviving the Coming Collapse will love this book.