Since October 2014 iBooks Author accepts files saved in Adobe InDesign Markup language and can use them for creating new ebooks. This is a good way for creating rich graphics documents. Probably no other way for this conversion.
Convert InDesign Markup Language document to iBooks Author e-book.
We have found one software suitable in our database for this conversion.
Apple macOS / Mac OS X software - convert idml to iba on OS X
Apple's free authoring tool for making great looking e-books for iPads
Convert from idml file format
|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.