"Little Wizard Stories of Oz" is collection, published in 1914, of six short stories for particularly young readers that were published separately in 1913, when a desperate Baum realized he needed Oz to pay the bills. Most Ozophiles place it on the shelf just before "Patchwork Girl," as the six short stories form a nice little intro to the second era of Oz.
The story this comic is based upon ("Dorothy and Toto") features Dorothy learning a very valuable lesson: sometimes the Wizard is a dick. As Dorothy is out and about on a nature hike, she's kidnapped by a horrible magician who can shrink or turn into a giant at will. Upon being threatened with getting turned into a doorknob (because I guess that's a thing that happens), Dorothy is forced to clean the monster's house. After Dorothy has subsequently washed several hundred dishes, she discovers that the monster is - in fact - the Wizard, who was attempting to teach her a lesson about why little girls shouldn't be wandering around magical fairy lands alone.
As I said, sometimes the Wizard is a dick.
(Also, cue the "AND THIS IS WHY WE DON'T TEACH LESSONS!" quote from Arrested Development.)
Lit Brick is a comic started by Jodie Troutman in an effort to read the entire Norton Anthology of English Literature. Having eventually succeeded in that goal, it now features comics about all manner of random literature. And yeah, they're all pretty dumb.