Module:Chapter Infobox/doc

For Previous Chapter:

num must be the current chapter number, this removes the need for all the #expr calls {{#invoke:Chapter Infobox|prev_chapter|num}}

For Next Chapter:

num must be the current chapter number, this removes the need for all the #expr calls {{#invoke:Chapter Infobox|next_chapter|num}}

Code uses/calls Module:Which_Chapter