One second after by William R. Forstchen
How would you survive if you lost all of your technology?  
This book takes you to a time following an EMP (electro magnetic pulse) which causes the failure of all of the high-tech electronic devices in the USA and parts of Europe. 
Set in the Black Mountains of North Caroline, John Matherson tries to save his family and his community in the face of disaster. 
It is a story of rediscovering lost skills, of survival and the rebuilding of communities following an apocalyptic event and the collapse of society. 
The first book in a trilogy, it will make you consider your ability to survive the loss of the things that we all take for granted.

Book Two – One year after
Book Three – The final day