There are active simulations going on: http://www.sciencerecorder.com/article.php?n=scientists-cond...

There are preparedness drills: http://www.independent.co.uk/news/world/americas/us-politics...

There's plenty of policy analysis: https://www.cato.org/publications/policy-analysis/social-eco...

Older .mil reports: http://www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA080907

There are entire books taking apart what happens in specific fields: https://www.ncbi.nlm.nih.gov/books/NBK219154/

Or you could just read disaster porn^W^W post-apocalyptic sci fi.

So, a lot depends on what kinds of info you want to find. But overall, I'd say it's not worth reading, because life's not going to be much fun. Even if you're prepared.