Just today I purchased an Objective-C programming book from the internet in PDF format. After that, I bough "Annotator" for iPhone so I could read the eBook. I set it up perfectly - and the entire eBook shows up BLANK!!!! I just assumed that Annotator wasn't very good, so I went and paid a little extra for "Files". Again, I set it up perfect, but the eBook still shows up blank!!!! Did I just waste $40? (eBook, Files and Annotator) Please help me!!