Books about anxiety

From Good E-Reader:

Sales of books related to “finding happiness” climbed a whopping 83% from a year ago, Barnes & Noble said.

Why are books that have to do with anxiety soaring? It could be because we are completely inundated with news 24/7, presented in a way that seems like the world is going to come crashing down any minute. Reading about an upcoming trade war or mass shootings invoke a sense of fear in you which triggers a reaction and creates a sense of fear in your subconscious which makes you insecure.