I recently participated in AdPit on Twitter. I garnered two requests, one of which was from "Midnight Frost Books", on Twitter as "Crimson Frost Books". They asked for a full and directed me to their guidelines. Any request is exciting, and while their guidelines are a little daunting and weird (but they are an e-pub, so I suppose that's for e-publishing), I'm considering their request.
However, I looked on Preditors and Editors: not listed. Googled them. Their website comes up but otherwise, it's books with the same name.
So...how do I research them? Or is this a sign to avoid them? I'd like to think I'm not a complete guppy anymore, but it never hurts to be cautious.