Once you've created your ebook, you'll want to take necessary steps to protect your work. Although many ebook compilers will enable you to password protect your ebook, none can offer complete security.
Copyrighting Your Ebook
The moment you create your ebook, US copyright laws protect you. However, if you should need to file an infringement lawsuit, you must register. Although registration is generally voluntary, it is recommended, as you certainly don't want your work to be copied and claimed by someone else. If you don't take time to register a copyright, you may have little or no recourse should your work be illegally copied.
Visit following sites to register online:
Click and Copyright http://www.clickandcopyright.com/
For further information, visit US Copyright Office: http://www.loc.gov/copyright/
International Standard Book Number (ISBN)
Once you get your copyright, your next step will be to obtain an ISBN.
An ISBN is a 10-digit number that uniquely identifies books and similar products that are published internationally. It is used to uniquely identify one specific title, whether it is a book, ebook or similar product from one specific publisher. This number is completely unique to that one title or edition.
If you would like to sell your ebooks in bookstores or online, you'll need to obtain an ISBN. Once you obtain your ISBN, you can submit your title to be listed in Books in Print database. Bookstores and Libraries refer to Books in Print when they need to order a particular book from a publisher.
When you're ready to order your ISBN, keep in mind, it can never be reused. Once it is assigned to a specific title, it cannot be used again -- even if title is no longer available. What this means is that if you update your book in any way, you will have to get a new number. In addition, if you're offering your ebook in different formats, you must use a separate ISBN for each format.