Against my better judgment, I step into this....
As Mathew said.... Type "calibre" into your search engine of choice (google, yahoo...etc).
Download and install.
Using Calibre you can convert an ebook you already have to the ePub format that can be read in iBooks. If the book you already have is a PDF you may want to skip all this and just pay 99 cents for Goodreader (search in the iPad app store) and read it on that.....
If all of this is too complex for you, then you really don't need to be doing it. What is being described to you is basic computer usage, not anything advanced.....
If the problem is a language issue, I'm sorry... this is the best I can do....
If (as I suspect) this is just a sick game... then fig off.....