The University of Michigan has a substantial collection of comics and graphic novels on the North Campus. This collection includes graphic medicine works and themes, and can serve as a useful resource for exploring this topic. Books in this collection are discoverable through MIRLYN, the Library's online catalog, and can be requested for delivery to other campus library locations, including the Taubman Health Sciences Library. You can find more information about the comics collection in the Comic Books and Graphic Novels library guide.
The Ypsilanti District Library (YDL) is widely recognized in the Graphic Medicine community as having a substantial collection. This was originally funded by a grant from the Will Eisner Foundation. The U-M graphic medicine community is fortunate to be located nearby. Here are some links to more information about the graphic medicine collection at YDL.
The Ann Arbor District Library (AADL) has an extensive collection of general audience comics, enriched with substantial numbers of works from manga and independent (indie) publishers. These collections include works that fall within graphic medicine as well as others. They also host events of interest, such as presentations by professional comic artists and authors, hosting webcasts, and providing workshops on comic creation.
While we give example titles of graphic medicine works, how would you find more like these in the library catalog? Of course, if you know the author or title, that makes it easy, but the best way to find relevant books and materials that you don't already know about is to use subject headings. Here are some examples that work in MIRLYN, the U-M catalog. You can try using these as example, and modify keywords to discover other subject headings. You can look at the subject headings or description of a book you already know about, or you can try combining terms like "comic books", "cartoons", "graphic novels", or "graphic works" with a topic.