How many volumes of manga does the first Love Hina graphic novel cover?
There are 14 manga volumes (which are graphic novels at around 200 pages each) and 2 novels (that do have pictures) that are separate from the manga. I have never seen a Love Hina Graphic Novel compiling any other Love Hina series, so I’m assuming you mean the novels. The two novels basically fill in the gaps and finish storylines started in the Manga, but are a two-part story outside the manga not a serielization of the manga. If I would you, I would read the entire 14 volumes before reading the two novels, but it’s really up to you, as they will all add to each other. It would totally be okay to read the first couple manga and then read the novels as the exact timeline of when the novels takes place is never truly clear.