Originally Posted by DaleDe
No, Adobe makes two PDF readers, one for books and one for documents. Adobe Reader is the one for business documents which ADE is intended for reading eBooks. It supports PDF and ePUB. This is all in our wiki by the way.
One other important fact to note is that pdf and epub specify a format for the book. ADE is a tool for downloading and reading both of those formats.
It happens to be developed by Adobe who's business it is to "advocate" a format they created.