Ah, the great question. When I was in school, teachers would always tell off anyone who brought comics or graphic novels to silent reading time. "They're not books!" they would exclaim.
They have words. They have a story, characters, conflict. They inflict a painful amount of feels at times. They discuss issues.
Is it that they have pictures that makes them not worthy of being called books?
To me, it seems snobby to claim that graphic novels don't count in literature.
Becky Cloonan has written a trilogy of sorts, The Ink and Thunder series, and each issue is a one-shot. They're carefully crafted, written, illustrated and inked by Becky herself. And I would call them literary-fantasy crossovers. There's a lot of hidden things in her work, imagery, symbolism, everything you'd find in a regular book.
I dare you to check them out. Each issue is only 99 cents on comixology.
So, what do you think about comics as books? Goodreads thankfully counts comics as books towards my yearly reading goal, since I've slowly started reading more comics than books lately.