iPad iOS8 - iPhoto migrated to Photos but my PhotoBooks text is not there, only photos in a new album

I'm sorry to say, no, you cannot recover your books, journals, slideshows.

See Apple's support document: Migrating from iPhoto for iOS to Photos on iOS 8

The following data will migrate from iPhoto to Photos.

• Any photos in your iPhoto library that aren't already in Photos are added.
• Image adjustments you made in iPhoto are migrated to Photos.
• If you applied image adjustments to photos synced to your iOS device from iTunes, a duplicate of each photo will be created in Photos with adjustments applied.
• Photos hidden in iPhoto do not appear in the Years, Moments, or Collections views in Photos, but are placed in an album titled Hidden.
• Photo Books, Web Journals, and Slideshows are converted into regular albums in Photos. Text and layouts are not preserved.
• Only projects created on the device performing the migration will be converted. Projects you synced from other devices to iPhoto via iCloud must be converted from the devices on which they were created.
• Photos marked as Favorites in iPhoto are marked as Favorites in Photos.
• Tags and captions from iPhoto are not displayed in Photos, but you can use them as search terms and they will show up respectively as Keywords and Titles in Photos search results.
• Flags from iPhoto are converted to the keyword Flagged.

Photo is a giant step backward. I'm astonished and so disappointed that Apple put out such a poor product and left us with no alternative.

Please send feedback to Apple about a usability issue or feature requests and let the developer team know what is missing. You can use this form:

Apple - iPhoto - Feedback