(In case of real emergency, maybe the paper version :- https://www.amazon.co.uk/Nuclear-War-Survival-Skills-Instruc...)
If you can put aside my prepper-paranoia then I suggest it's a good practical and insightful read. There are many tips in there that would serve you well during any disaster, man made or otherwise.
Don't forget to buy your geiger counter while stocks last :-)
Oh and get your copy of SAS Survival Handbook, a timeless read :- https://www.amazon.co.uk/SAS-Survival-Handbook-Definitive-Gu...