The difference is in the level of assistance we provide with the publishing aspects. With the Essentials package you get professionally designed book files and all the information you need to self-publish your book successfully. You upload and manage the publishing accounts with our guided instructions. With the Boutique and Premium package you'll have a project manager that tracks every step of the process, sets up the account you need to start distributing and selling your book, reviews and consults you on the distribution strategy, pricing, meta-data optimization, and more. You'll get access to discounts and a wide array of promotional tools. The Premium package also includes copy editing and proofreading that covers most average-length novels, memoirs, and business books.