ELI5: Explain Like I'm 5

Preface

A preface is a short introduction to a book or other written work. It usually includes some important information about the author, why they wrote the book, and a few words of thanks to anyone who helped them. It is usually written by the author themselves and explains why they wanted to write the book and what the reader will learn from it. Prefaces are helpful because they give readers a better understanding of the book before they begin reading.