Amazon Cloud Reader is used with a regular Amazon account, so if you already have an existing Amazon account, then there's no need to create a new one - unless of course you want to have a separate account exclusively for purchasing and reading Kindle books.
A na eji akaụntụ Amazon Amazon na akaụntụ Amazon mgbe niile, yabụ ọ bụrụ na ị nwere akaụntụ Amazon dị ugbu a, ọ dịghị mkpa ịmepụta ọhụụ - ọ gwụla ma ịchọrọ ịmepụta akaụntụ dị iche iche maka ịzụta ma gụọ akwụkwọ Kindle.