iBooks Author templates include built-in text boxes with placeholder text you simply type over. If you add more content than can fit, new pages are added automatically and the content flows into them.
You can add custom text boxes that aren’t part of the rest of the document flow. For example, you might want to add a decorative, unique banner on a specific page. You can’t link two custom text boxes to flow text from one to the other.
Shapes also have built-in text boxes. Text you type in a shape isn’t part of the overall document text flow.
Add a text box
In the toolbar, click Text Box.
A selected text box appears on the page.
Drag the box where you want it on the page.
Type over the placeholder text.
You can resize the text box using its selection handles.
Important: To make sure the fonts in your completed book are displayed correctly, use only fonts in TrueType (.ttf) or OpenType (.otf) format. If you’re not sure what format a font is, preview your book in iBooks to be sure the font looks correct.