A few weeks ago, I discussed the new iBooks Author app and also outlined some of my concerns with the End User Licensing Agreement for the application. If you recall, some people were interpreting the EULA as Apple claiming some ownership of any content that is authored using the iBooks Author app, whether it is uploaded onto the iBookstore or not. They compared it to Microsoft claiming some ownership of every document written with MS Word or any presentation created with PowerPoint.
Enough people expressed their concerns that Apple recently modified its EULA to clarify their intentions. Looking at the revised EULA, authors will retain all of their rights for the content of their work but are not able to sell the specific iBooks files anywhere but through the iBookstore. To check out the EULA for yourself, visit the App Store Preview. For an in-depth analysis of the EULA language, check out this post from AppAdvice.