I have drawn a lot of cartoons/comics (I use the terms interchangeably) over the last decade. Most are on topics related to evaluation, research, data visualization, and design.
Just about every blog post I share on freshspectrum includes at least one cartoon. Some include lots. Outside of this blog, you’ll also find my cartoons in other people’s presentations, books, blog posts, and on office walls worldwide.
*I use the terms cartoons/comics interchangeably.
About those cartoons, umm, can I use one in a…
So I creative commons license all of my cartoons. So yes, you can use them.
Attribution-NonCommercial (CC BY-NC)

This license lets others remix, tweak, and build upon your work non-commercially, and although their new works must also acknowledge you and be non-commercial, they don’t have to license their derivative works on the same terms.
View License Deed | View Legal Code
But what if it’s commercial?
Reach out to me on LinkedIn and ask, I may just say yes. Note: I don’t like signing long legal documents, reviewing contracts is not worth the small budgets publishers pay to license.