Attempting to gain more interest on a Facebook page

We've had a steady increase in random page "likes" for Paranormal America and we've actually had a fairly steady drip of a purchase or two each day this month with little-to-no promotion on our part. In addition, we've now gained two unsolicited 5-Star reviews for the book and have sold two copies of the paperback.

However, we'd still very much like to get this project a bit more solid and figure out how to sell enough copies to make it worth all the authors' time who sent in a story. To that end, we're trying to come up with some more things we can do to create a more steady flow of traffic and interest to the page and hopefully, the website/Amazon to buy the book.

Today, as a first step I've created 127 (!) images with little facts from across the country about the most haunted locations in America. The idea is that people will find these interesting and dig through them and more importantly, share. I've subtly asked them if they've been to any of these locations and to give their thoughts/findings if so.

My only concern with this idea is that it has nothing to do with the book and might be confusing - but there is only so much we can do with the book information before it's just tedious spamming. I'm trying to build up interesting information to go along side the book.

Here are some examples:

Will update with any noticeable changes in reaction to this first set of images.

Update:

So the response to these images? Practically zero. Had a couple of comments (from authors of the book) and a few likes from those who generally like other things we've done (friends of my wife).

In retrospect, these may not have been entirely clear so I guess next time I'll just need to come up with a better way to present information if it is purely for random knowledge.

There was not a single share, no increased likes to the page, and no discussion generated. This is clearly marked as a FAIL in my book of learning. :)