Ah, maybe whover told/ wrote that was referring to the fact that originally, Eric was planned to be only a
graphic novel*, as which it is still being sold, but also was sold as a regular printed book without so much as an illustration (as which I know it and own it). Had it been published as a graphic novel only, the story in it would have been what fandom calls uncanonical (or something like that), as it would have fallen out of the regular Discworld series. Until the next book containing Rincewind was written, though, these plans had apparently already been changed.
Pfft, two minor and hopefully helpful suggestions:
First, if you reply to a topic that has been dormant for months in the future, don't be dissapointed if you get no initial response. I am saying this just in case, and
know as I am answering pretty much ASAP this might look slightly contradictory. Still, it might happen. That does not mean you shouldn't pick it up, as waiting for a fresh response to reply to might mean less activity in the minor forums right now.
Two: When you edit a post, you can see a small box where you can type in your reason for editing. it is common board tradition to make use of this, for example to just enter "spellin" or "added word" or something. Editing content has been used to change the overall tone, and content, and an occasion there has been, say, some abuse in the one or other more heated discussion. Changing spelling and wording, or occasionally editing in that the penny has dropped after a question you don't need an answer for anymore, is okay. Changing history is not. (Not implying you did that, mind you. I am just pointing out. i hope you don't mind.)
That said, thank you for listening.
*Which explains its relative shortness in comparison to other DW novels.