A bunch of books.

[clivel]

A free pattern for a discbound leather notebook cover can be found here free disk bound leather portfolio pdf pattern scroll down to the bottom of the page to download the pattern.

This makes use of the cheapest Staples cover, which consists of two sheets of plastic, these are folded back on each other and are then slid into a pocket, this gives two advantages.
Firstly, one does not have to cut the multiple holes required for the disks, and secondly one does not have those huge, butt ugly discs sticking out the back of the notebook spine.

Clive

 

[MagiKelly]

I like the look of the exposed discs. This may be because I use the metal discs mostly or just my preference. I have thought about having the discs internal to the book but then you lose the option of folding the front cover round to the back like a spiral  bound notebook. If they are going to be inside it feels like the easier option is just to install a standard ring binder mechanism, which I have done on a number of books. 

[MarshalWill]

Sound logic, MK. I also like to fold the front cover around to the back.