Nuclear War Survival Skills by Cresson Kearny [1] is the most substantial classic work on this. There's no substitute for a hard copy, but the publisher also provides a free PDF version [2].
Original edition was in 1979. Significantly updated in 1987. Small addition in 2001. The links below are to the 1987 version, I think.
That said, I think an EMP and cyberattack is more likely.
[1] - https://en.wikipedia.org/wiki/Cresson_Kearny
[2] - http://oism.org/nwss/
[3] - another version - http://www.ki4u.com/free_book/s73p904.htm
Original edition was in 1979. Significantly updated in 1987. Small addition in 2001. The links below are to the 1987 version, I think.
That said, I think an EMP and cyberattack is more likely.
[1] - https://en.wikipedia.org/wiki/Cresson_Kearny
[2] - http://oism.org/nwss/
[3] - another version - http://www.ki4u.com/free_book/s73p904.htm