Basic Book is one of the templates that you can use to make a new book or shell book.
It has these pages: Front Cover, Credits Page, Title Page, and Back Cover pages. In addition, it gives you a number of different templates. You see them when you add a page.
You can add a page (an inside page) to the book.
You can choose a page that puts a picture in the desired location on the page.
You can choose a page that is only for words or only for a picture.
You can customize any of the pages, or you can use the Custom page template to design your own page (example).
https://vimeo.com/album/3146448/video/112825489 is about the Basic Book template. It will help you understand other videos better.
In the
Edit tab, you can use the toolbar to set the page size and orientation.