The media types and formats of Book and Volume are, at least for me, difficult to parse. The most obvious of these is text. Another is the image in the header space. I am not sure how to figure out the formats of either of these types of media. The interactive fiction file is a .z5 format, a variation of the Z-machine Z-code file system. The Z-machine is a virtual machine used to run interactive fictions on a variety of operating and hardware systems. Despite quite a bit of searching, I haven't managed to figure out how to access the .z5 file's source code. It seems like I should be able to do so with the program Inform, but I can't get it to work. I even attempted to open the file in the Console, where I got what seemed to be messages from the Spatterlight Z-code interpreter. I'm uncertain if this is by design, or if I simply don't know what I'm doing.