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I have several PDF ebooks in my iBooks. enter image description here

Some of them have their titles & authors visible. Some only displayed as "untitled".

Is there any PDF metadata editor for iPad?

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have you tried: 1. synch pdf books with iTunes on you mac 2. on your mac 3. sync back with iTunes – microspino Jan 19 '12 at 10:36

I am a big fan of PDF Pen on the Mac and would encourage you to shoot them an email linking back to here. Adding that as a feature to their new iOS PDF editor might be something they can do quickly and really make it quicker to make these sorts of changes.

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