I am in the process of creating some book illustrations for some dark children's stories (more children's stories for adults than actual stories for children!) and would like some feedback please. The stories were written by someone I know very well and they are hoping to publish via lulu.com. A sort of self-publish thingy.
The pictures of course do not make sense without the accompanying text but to help, the singing moon cows are part of a sci-fi style short story and the girl in the cave is part of a dark..eventually unhappy ending story of shattered dreams. I'ev tried to reflect the creepy nature of the shattered dreams story by manipulating the colours and lighting of my original hand-drawn picture. The first pic is just meant to look lively and fun.
Thanks in advance for feedback.

All feedback very much appreciated.
Many thanks
Leah