The top map shows the average spending on books in major American cities in 2012.
I know correlation doesn’t always mean causation. The Newtown school massacre was in Connecticut which has some of the lowest death and gun ownership numbers. There’re still plenty of guns there and at least one deranged guy.
There might be some crossover between these maps. Generally speaking, it looks like where there’s more book buying, there also tends to be fewer gun deaths.
The NRA would probably say that because people are spending their money on books they don’t have enough money to buy guns with.
If that’s the case, that’s ok.