Children's Book Cover Design

I have written a children's book of a collection of ancient Greek Myths for children between the ages of 9-11. I would like a the book cover designed.
I have had an illustration designed which will be the main focus of the design and comprises a number of great characters from the book.
I would like the cover to be appropriate for children, engaging, surreal and mythical.
If you are interested in the project, please contact me to discuss further.