Anyone knows which theme is used on this blog?

Hi everyone, I’m new to Ghost and I was looking for themes and I saw this blog and I like the design

but I can’t find which theme they’re using.

I did CTRL-U and CTRL-F to look for the word Theme thinking that I would find it but no, and I don’t see an e-mail address to contact them.

Can anyone tell me which theme they think it is?

Or can someone suggest a theme that looks similar to this?

I like it because:

  1. it doesn’t require JavaScript to load any pages, I can turn JS off and everything works on my browser

  2. the menu at the top is static, one click one page

It is Casper

Is there a free Casper-like theme that comes with a Sidebar by default?