[header] How to annotate a book [title] Annotate with a highlighter and a pen or pencil. [step] One of the easiest ways to annotate a book is to use a highlighter and pen or pencil directly on the text. Choose a highlighter in a shade that is easy for you to read on the page, such as a light blue or orange color. 
The standard yellow highlighter shade would also work too. Go for a pen in a dark color so it's easy to read.