Hi, I developed a course book in iBook Author. When I try to link to this books in Dashboard of iTunes U course manager I receive the message: file extension (iba) unknown.
Is there another way?
try linking the .ibooks file. This is the one that can be opened on the ipad in the ibooks app. The .iba file can only be opened in ibooks author.
.ibooks file is created when you "publish" the ibook.
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