While I tend to agree that aspects of 1984 have been and continue to be seen time and again in societies around the world......the work itself is fiction. The OP asked for non-fiction books.
Oh yes! A Short History of Nearly Everything is really good. I thoroughly enjoyed it (Bill Bryson can write funnier than anyone I've read, apart from P.G. Wodehouse). I would just add a caveat that I read it first in junior high and it blew my mind. Maybe for someone who is read up a bit more, it might not be as mindblowing.
The article doesn't mention this but if there is a freemium component to the product, a 2% conversion rate is actually not bad. Not great, but not bad either. From what I've seen, a 3-7% conversion rate would be quite good for such a product.