I'm not particularly paranoid (I suppose that's what paranoid people say...), but I do think there's a certain fragility to our civilisation that we're happy to overlook.
He (and I, who started becoming a nuclear war survivalist in 1968-9 in 2nd-3rd grade when my mother became a Civil Defense Block Mother, I still have the sign) recommend you read another book on expedient nuclear war survival, which is a lot more timeless. It's based on serious research at Oak Ridge, up to and including handing a set of printed instructions to an "average" American family, video taping them trying to follow them, and iterating on them. Oh, yeah, in the traditional fashion, the author(s) tried out this stuff themselves: Nuclear War Survival Skills
Check out the official on-line copy here: http://www.oism.org/nwss/ but if you're worried about a nuclear weapon event, get the dead tree copy, for the Kearny Fallout Meter needs better precision than you'll get from digital -> computer printer.
For that matter, you almost certainly want dead tree (or microfiche, there's a company that used to do that) copies for when the light go out.
After that, there's a lot more, but I don't have time to go into it (in the middle of renovating a house built in 1910), check my previous postings on the subject if you can find them, 5 minutes with Google and the built in search engine were useless and I have precise search terms, e.g. the obscure Bad Times Primer by C.G. Cobb. Or email me for more (address is in my info).
https://www.amazon.com/Back-Basics-Complete-Traditional-Skil...
It's sort of a homesteading guide, starting with what sort of land is suitable and discussing the construction of buildings and farming and various crafts. It has a lot of information that would be handy in a world where energy is no longer incredibly abundant.
A 2 year prep isn't going to mean shit if the oil stops flowing.