Final answer:
The three different titles of a book (original, new, and subtitle) have different roles in conveying information to the reader.
Step-by-step explanation:
The three different titles of this book (original, new, and subtitle) play different roles in conveying information to the reader.
The original title is the initial title given to the book by the author or publisher. It is the primary identifier of the book and is used to refer to the work in general.
The new title refers to a revised or updated version of the original title. It may be used when the book undergoes significant changes, such as adding new content or modifying the focus.
The subtitle is an additional phrase or sentence that provides more specific information about the content or theme of the book. It is often placed after the main title and helps to clarify or enhance the reader's understanding of the work.