Horizon - win a free copy three ways

Horizon is published today, and to celebrate I'm running three giveaways.

All you have to do to win a free epub of Horizon is to:

Twitter - retweet my tweet - https://twitter.com/stevenson_keith/s...
Google+ - share my post to your stream - https://plus.google.com/1091511818363...
Facebook - share my post to your timeline - https://www.facebook.com/