I have some experience creating iphone applications and would now like to create an iphone book application. Browsing the Book category in iTunes it seems to there is a standard format for building these apps, however, googling for how to build an iphone book app produces no useful results. This type of application is also not addressed in any of the iphone development books I've seen.

Is there a standard method fot building these book applications? Or is it simply copying the text is some format (pdf, txt, html?) and then writing a document handling api? It seems there already must exist apis for doing this. Can anyone point me in the right direction. Thanks in advance!