The current version of Leafpub doesn't support a contact form or blog comments for now. I kind of feel similarly to Cory LaViska does in this post, but the difference is that I think Disqus is bad and wrong (big data on your comments, not self-hosted and injects ads into the comments for your users).
If you want to contact me,
My YouTube channel
If your enquiry relates to my public hospital work, you can email, or call Cairns Hospital Switchboard on (07) 4226 0000.