Circle of Pacts ;from the beginning

I have wanting to upgrade my work, while searching here, i found the Circle of Pacts discussion.
Where can I begin reading the subject from the beginning?

From Book of Azazel I suppose, not sure though.

Also, there’s 4 pages of search results dating back to 17th June 2012 on here, if you search the words circle pacts and leave the * in the field “By user.”