You may use the copyright symbol, the letter "c" in a circle, or the word "copyright" to signify your work is original. Follow the copyright with the year in which it was written and your name. You do not need to have registered your copyright to use this identification.
Go to copyright.gov. Read the tutorials on registering a copyright.
Download application Form TX to apply for a registered copyright for your book. Form TX covers novels, fiction, nonfiction, poetry, textbooks, directories, reference books, catalogs, and advertising copy. If your book is a periodical or serial, then use Form SE.
Fill out the application electronically, and submit the application online with the required fee.
Upload an electronic copy of your work (see the copyright.gov site for acceptable file formats), or click the "Send by Mail" link to download the shipping form to send with a hard copy of your book.