Google Hangouts are a feature of Google+ and they allow you to hold a webinar with nine people or less. You can use Google Hangouts as a reward system for super fans who introduce your book to new readers. You may already know who these people are but if you don’t you’ll need to find out. Hold a contest with specific goals for fans to promote your book(s) and use the hangout as the reward. You’ll need to have written rules that enforce a “no spamming” rule to protect your reputation but if done carefully this could be a great incentive for fans to bring you new readers. You can learn more about Google Hangouts here.