PDF Flip Page Creator for iPad

What do you use to make ebook? Do you still use the txt? In my point of view,[url= http://www.page-flipping.com/flipbook-digital-publishing-software/index.html] Flipping book [/url] now becomes the main popular digital book. As the iPad become a very popular media mobile device, the software also should suit for iPad! PDF Flip Page Creator for iPad would be one of your necessities on iPad!