L. Penelope said: "Loving your blog! Maybe write a post on how authors can use CRM in their marketing. I'm intrigued." 

Thank you, L. Penelope! Of course. I'm in the midst of setting mine up and going through 2,000+ of my subscribers (a combined number of subscribers to my blog, newsletter, Patreon, an excel spreadsheet of beta readers, and PayPal customers; this number doesn't include over 60K combined followers on all my social media channels whom I intend to also add, one by one, as I have time).