Ask them to sign up to your book reviewer team, and have it be a little more official by having a specific email subscriber list. (trainingauthors.com)
Besides growing your online fan base, virtual tours can help grow your blog and email subscriber list as new people discover your website. (bookmarketingtools.com)
He has a background in marketing and wanted to help supercharge my fiction email subscriber list by making a few changes on my site and in my books. (thecreativepenn.com)