How can I replace a updated eBook (not via iBookstore) in Apples iBooks-App (on OS X or iOS) without loosing all the associated notes, bookmarks etc.?
For example: Some of O'REILLYs eBooks update quite frequently. I can download the new ePub-Version from their store (NOT Apples iBookstore) and add it to the iBooks-Library. But than I have to delete the old version manually — and loose all the notes, bookmarks etc.. How can I replace the old version with the new one without loosing all my notes etc?