It should be possible to open IBOOKS ebook using iBooks Author and export it in IBA format.
Convert iBooks e-book to iBooks Author e-book.
We have found one software suitable in our database for this conversion.
Apple macOS / Mac OS X software - convert ibooks to iba on OS X
iBooks Author is used to create multi-touch e-books for Apple iPad.
Convert from ibooks file
to iba file
|Yes, iBooks Author supports iba file conversion as a target file type.||Yes||Yes||iba editor||No||No||No||No|
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.