Books, manuscripts, and speeches are "literary works" under 17 U.S.C. § 102(a)(1), and although copyright arises automatically on fixation, registration with the U.S. Copyright Office is the step that turns a quiet legal right into an enforceable, valuable asset. This UpLaw research article maps the full doctrine: what qualifies as protectable expression, the human-author rule and the generative-AI disclaimer, the idea/expression divide, and the fixation requirement that decides whether an improvised speech is protected at all. It then works through published versus unpublished status, why registration timing controls the right to sue and the availability of statutory damages and fees under §§ 411 and 412, the eCO application choices, the deposit and best-edition rules, preregistration for at-risk manuscripts, group registration (GRUW and GRTX), and the ownership tangles of ghostwriting, joint authorship, pen names, and anonymity. Running hypotheticals, a start-to-finish walkthrough, an FAQ, and cross-references to related UpLaw resources ground the analysis in practice.