How to view and save a pdf in ibooks with your iPhone, iPad, or iPod touch:
When you have downloaded your Ebook doube tap the screen and select “OPEN WITH IBOOKS”
When you use iBooks to open a PDF, iBooks automatically saves a copy of the pdf to your iBooks PDF shelf.
The next time you sync your iOS device with a computer, your PDF saves to either iBooks or iTunes.
Sync and save PDFs
You can also add PDFs to your iTunes library on your computer by dragging and dropping the PDF into your iTunes Book library. The files will appear when you are preparing your device to sync. If you’re using OS X Mavericks or later, drag and drop your PDFs into your iBooks library using iBooks for Mac. All PDF or iBook files in your iBooks library are available to sync to your iOS device via iTunes.
To sync a PDF from your computer to iBooks on your iPhone, iPad, or iPod touch:
1. Select your iOS device. …
2. Under Settings, click Books.
3. Select Sync Books.
4. If iTunes is set to sync only selected books, make sure that there’s a check in the checkbox next to the PDF you want to sync.
5. Click Sync
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