Self-Help Book Cover Design

I'm looking for a designer to create eye-catching ebook and paperback book covers for my self-help book, "The Portal Path Method."

Requirements:
- Design front and back covers, with the back cover being slightly different.
- Use my existing book cover illustration.

Ideal Skills:
- Experience in book cover design, especially in the self-help genre.
- Ability to create designs that are eye-catching and use bright color contrasts.
- Proficiency in creating thumbnails that look good at a smaller scale.

Please provide a portfolio showcasing similar work.