Apple updated its End User License Agreement (EULA) for the iBooks Author application specifically stating Apple's intentions concerning content ownership and distribution.

Apple’s amended EULA outlines that only .iBooks formatted products created in iBooks Author will sell through the iBookstore. However, Apple will sell the content without claiming any rights to the books, and will not restrict where authors can redistribute the content, granted the redistributed work doesn't contain any of the file created in the .iBooks version.

These changes are likely in response to the controversy stemming from the original language in the iBooks EULA after iBooks Author’s launch. Apple worded the EULA in such a way that it appeared Apple was trying to claim content rights to all books created for iBooks Textbooks as well as control where the books could be published.

The original EULA wording:

B. Distribution of your Work. As a condition of this License and provided you are in compliance with its terms, your Work may be distributed as follows:
(i) if your Work is provided for free (at no charge), you may distribute the Work by any available means;


(ii) if your Work is provided for a fee (including as part of any subscription-based product or service), you may only distribute the Work through Apple and such distribution is subject to the following limitations and conditions: (a) you will be required to enter into a separate written agreement with Apple (or an Apple affiliate or subsidiary) before any commercial distribution of your Work may take place; and (b) Apple may determine for any reason and in its sole discretion not to select your Work for distribution.
The new EULA wording:

B. Distribution of Works Generated Using the iBooks Author Software. As a condition of this License and provided you are in compliance with its terms, works generated using iBooks Author may be distributed as follows:
(i) if the work is provided for free (at no charge), you may distribute it by any means;

(ii) if the work is provided for a fee (including as part of any subscription-based product or service) and includes files in the .ibooks format generated using iBooks Author, the work may only be distributed through Apple, and such distribution will be subject to a separate written agreement with Apple (or an Apple affiliate or subsidiary); provided, however, that this restriction will not apply to the content of the work when distributed in a form that does not include files in the .ibooks format generated using iBooks Author. You retain all your rights in the content of your works, and you may distribute such content by any means when it does not include files in the .ibooks format generated by iBooks Author.
The new EULA clarifies Apple’s intentions with iBooks formatted content, and the new EULA is a free download through the App Store. Also, Apple released a minor update to iBooks (version 2.0.1) fixing an error where certain iBooks Textbooks wouldn’t open.

Source: 9to5 Mac