Kindle Direct Publishing is Amazon.com's e-book publishing platform launched in November 2007, concurrently with the first Amazon Kindle device. Originally called Digital Text Platform, the platform allows authors and publishers to publish their books to the Amazon Kindle Store.

The cost will depend on a number of different options and avenues available to you as an author, such as:

1) Do you have design skills?

2) Do you have graphics experience?

3) Will you do the writing yourself or hire ghost writers?

4) What type of books do you wish to write?

5) and many others......

There are a number of benefits of being a self published author, like:

1) No direct timelines to be met.

2) Complete control over the project.

3) Endless options of what types of books to write.

4) and many others....