Cool, I think that's OK but don't really know.

I trust you are aware to not post your actual book there, as that counts as publishing. Occasionally someone pops on this forum and announces their book is on their website as a PDF and they are seeking an agent for it. You can hear the collective dismay from everyone seep out the computer screen.

So don't do that, but the artwork I am less clear on. My daughter is a fantastic artist and has been doing a few character sketches for me.