Updating an iBook with a newer version

Question

We are using  iBooks Author to produce iBooks internally for manuals etc. We have an issue where when manuals are updated it is very difficult to get them on to the iPads.
The newer version of the manual displays fine on my mac air, but won't update on my iPad. I've tried deleting the old version from iBooks, clearing Safari's cache, turning it off and on again and still the old version comes back to iBooks.
To get the new iBook: I've downloaded it to Safari and chosen open in "iBooks"
I've searched for some solutions and come up short.
Any pointers would be appreciated.
Thanks in advance

Answer 1

Each device needs to download the update. It wise to delete the old version- which is not needed as the book is not via the store...it's not seen as an update..just another book.
Do you use Dropbox or dimilar? If not maybe you should, it's free and the app can go on all your staff iPads and download from a supplied link.
i Send photo books to family "across the water" and while Apples Safari option seems fine, it can be iffy on some machines...so I stick to the old and easy method.