E-Book & Paperback Distribution Website

I need a website to distribute my e-books and paperbacks. The site should be SEO optimized and have a secure payment gateway for an easy checkout process.

Key Requirements:
- Integrate with existing website
- Mobile-friendly layout
- Find and integrate with 20+ e-commerce sites for 4 books
- Must be experienced in website development and e-book distribution

Ideal Skills:
- Website development
- SEO strategy
- E-commerce integration
- Mobile responsiveness

Please include your experience in your application.