It's interesting to see Ruby Weekly visitors converted at 6.7%. I always like to see data like this. In this case, I'm quite impressed you got over 500 visitors that way too, as I only gave it a minor feature right in the middle of the newsletter (things like this perform and convert a lot better when featured at the top of the mail).<p>In my experience, conversions go through the roof when the editorial mention includes a recommendation. I hadn't seen the book, so I could only give it a casual mention. If you reach out further in advance and allow people to review it, you can get better mentions, not just in newsletters but on people's blogs and sites like RubyFlow, etc. This will increase conversions a lot.<p>When you finish the book, definitely hit me up. Assuming it's of the right quality, I think even more people will be more interested and I should be able to mention it again.