The reason why authors put headings into books is because... People then know what they are going to read about and can skip it if they want.
The reason why authors put subheadings into books is because... They will under stand a little better about what they are reading and get a short preview.
The reason why authors put Introductions into books is because... There is a introduction in the book so that the reading is caught in the book.
The reason why authors put maps into books is because... The person will know where they are and get what is happening.
The reason why authors put captions and labels into books is because... It will help people to understand a short paragraph or picture.
The reason why authors put photographs and illustrations into books is because... Helps people really make a picture in their head and focus on the details.
The reason why authors put timelines into books is because...
The reason why authors put Bibliography into books is because... It helps people understand where to look for more information and additional stuff.
The reason why authors put Inserts and Sidebars into books is because...
They will catch your attention and draw you to the stuff on the side and make you dig deeper than just reading.
The reason why authors put Table of Contents into books is because...You can look what the book is going to be about and what will happened and what they are talking about in the book.
The reason why authors put Diagrams and Cutaways into books is because... Then the reader can understand the information better with more detail
The reason why authors put Index into books is because... So that the reader can go to the Index to look up key topics in the book.
The reason why authors put Glossary's into books is because... Is so that people can look up word that they don't know the meaning of.
The reason why authors put Diagrams and Cutaways into books is because... It will help people see whats going on and get a image the head.