Zip file accessed by Calibre, an eBook conversion application; contains .CBZ and .CBR files; also contains a .TXT file called comics.txt which is encoded in UTF-8.
The CBC file will look similar to this:
The comics.txt file should hold a list of the comic files contained inside the CBC file. It will look similar to this:
Calibre automatically converts the CBC file into an eBook with a Table of Contents pointing to each entry in the comics.txt file.