There are several ways to layout a Picture Book

These are two of them. I’m not going to get into details here, because there are excellent resources already.

Image courtesy of Tara Lazar.

Image courtesy of Words & Pictures.

If you’re interested in learning more about picture-book construction, please see these two web pages:

Graphic Novels are Different

This page from the Durham Library succinctly explains Graphic Novels.
If you’re interested in improving your graphic-novel writing skills, check out this community. I belong to it. Also, check out the many resources offered by The Society of Children’s Books and Illustrators’ website. (I joined it in 2007.)