The term BOOK OPENING is composed of two words, PREFACE and OPENING. The word PREFACE is a 7-letter word meaning an introduction to a book or other written work, usually written by the author. It typically provides background information about the work and its author, as well as a brief explanation of the purpose of the work. The word OPENING refers to the first few pages of a book, which often contain the title page, copyright information, and a table of contents.