Protection is for the party that holds the copyright. Some of the images are mine and some I have been given written permission by the copyright holder to publish commercially in the iTunes Bookstore.
I have performed a due diligence process which included checking that the Exif file to establish if they could claim to entitlement this included 'Camera ID, creation Date, Time, Place, Author, Copyright Xchecked with the event date time place etc.
The meta data in the Exif file will agree with the attribution in the caption. Ant..