Here are a couple more things you might want to look at:
- you need a comma after Hey (Hey Authors)
- audiobooks are "narrated" not "dictated"
- inconsistent capitalization in headings throughout (e.g. Write your book, Publish your Book)
- you need a comma before "and we'll take care of the rest" (under Publish your Book)
- Painfree should be hyphenated (Pain-free)
There are a couple of stylistic choices you might want to consider as well. You've got quite a few run on sentences. And most writers use "word processors" not "text editors" (assuming you're going for the average writer, not the HN crowd).
(Just trying to be helpful, please don't take this as criticism. Congrats on your launch!)