Book Cover Designers are professionals who design the cover of your book and consult with you at every step on the way. You have full control over the final design and the cover should be a work of art that will reflect your wishes.
Tip #1: If you hire a designer make sure he/she is aware that you need two files for your e-books, each having slightly different specifications. One is inserted into the e-book, the other is the cover displayed on the sites.