Nico et al .
It is important that this is not used in a manipulative way. But I find that the BEST people to reach readers is other readers. The elusive word-of-mouth recommendation.
I have observed (stalked in some cases) some of the most successful authors since 2011. There is one thing they all have in common: they make the ASK for their readers to go out and share the news. These reader shout outs do not go out to social media accounts with thousands of members, they go out to small, personal social media accounts. It is my opinion, that these small, personal shout outs carry very far.
When you do this, you need to have brought your readers WITH you. This is why I write live (sharing chapters as I write). I NEED my readers to be there with me or I fail. I'm not talking about sales, I mean just getting writing done. I am not a solo-style person or writer. This is the blog post I put out, asking for help. (http://elizabethannwest.com/pemberleypossibilities/if-you-will-help/)
This is not a "Trick" if you are not genuine, if you are not connecting with your readers on a personal basis before this request, this will not do much for you. But when I talk about success, I talk about WE. Because it's absolutely a team thing. I can't write without them, I can't get the word out without them. I do not ask them to pity me, I just ask them to participate.
I make sure to have a solid goal/hope for the team. I make it clear what I am asking for. I make it easy for people to copy and paste. This post has been shared by a BUNCH of authors I am friends with in my genre, and it is individual readers that are grabbing my simple messages and links and sharing them, even adding their own words to the message. And what is being broadcast is resonating with other readers, a new book is out in an established series by an author they can count on.