Social media marketing

I’m marketing a 300-page trade paperback that details how to start your own business on a shoestring and survive in these hard times. I’d like to use social media, influencers or those with large Twitter or Instagram followings. But, here’s the problem: You can find avenues to reach stamp collectors, beekeepers, backpackers, political activists, etc., but how do you find a list or database that is aimed at the unemployed? Anyone have an answer or suggestion?