What is written in front of the book is called preface, and what is written at the back of the book is called postscript. Its purpose is to introduce the main idea of the book and the author's intention. The preface is usually written in an explanatory or narrative text.
For this collection of poems you want to write, you should write it from the following aspects.
1, introducing the origin.
2. Introduce the characters and experiences in the book.
3. General contents
4. Thank you!