To add an image, save the image in your resources folder in your manuscript folder.

Then, where you want the image to appear in your book, type this on a line by itself:

So, if you added a file named cats.png to your resources folder, and you wanted a caption that said "Cats", you would type this:

You could also insert the image with no caption, like this:

You can find more instructions for inserting images in the Markua manual here:

https://leanpub.com/markua/read#images