Graphic novels are an important tool for engagement
"Graphic novels are an important tool for engaging reluctant and less-able readers. The pictures provide a powerful support for readers who struggle with text. Struggling students are able to read books that are popular, interesting, and motivating, which is often not true when those struggling readers are working with text-only books. Graphic novels are primarily produced in series, which allows a struggling reader to stay with familiar characters and plot lines. Finally, readers who struggle with text can still use all of the comprehension strategies with which we are familiar."
Article lists a number of of authors and titles.