Fantasy Children's Book Creation

I'm looking for a talented illustrator to create illustrations for a book for 8-12 year-olds. It is scriptural and I want illustrations to be vivid, think Polar Express. It will have 15-30 illustrations.

Requirements:
- Proficiency in creating captivating digital art illustrations

Ideal Skills:
- Ability to conceptualize and design digital illustrations

Please provide samples of previous work.