Reply To: epub for kindle convert to epub for iBooks

James,

One way, which I have playing with the last few days, is using Oxygen XML Editor. It allows you to, without unzipping the ePub, modify the ePub file (it even has ePubCheck built in so you can make sure its valid). You might try opening up your ePub, adding underscores or hyphens in place of spaces in the file names and in the links found in the toc.ncx, content.opf, and the table of contents HTML files and then just save your changes, run validation, and then you should be done. It might be tedious but probably better than starting over. If you are comfortable with zipping and unzipping your ePub, you might also try finding a script that you can replace the spaces in the file names with underscores/hyphens, and either modifying the links by hand or running a regex on each file or files (using TextEdit, Sublime Text, or another text editor found under this list https://www.digitalbookworld.com/resources-going-from-indesign-to-ebook/#editing) to replace those spaces in the hyperlinks.

Oxygen XML download: https://www.oxygenxml.com/download.html
Using Oxygen XML to edit your ePub: https://www.oxygenxml.com/xml_editor/epub.html

Sigil might also work, I’ve heard it does some weird things to code (it has WYSIWYG functionality for those who dont know HTML/CSS), but I’ve never used it.
Sigil: https://code.google.com/p/sigil/

Best of luck to you!