BookBildr lets you preview your book to check the general layout of the pages. Please note that the exact formatting might differ between book types, but the order of the pages (left-right) will be just like in the preview.
How to Preview Your Book
You can preview your book at any time and check the layout of the pages. To do that, click on the Preview icon:
The Preview litebox will appear. Click on a corner to turn pages:
Click on the X icon in the top right corner to close Preview.
Note: the Preview feature is for information purposes only to check the layout and the order of your pages. The exact way your book is going to be printed depends on the format you choose. Go to FAQ – Book Formatting for more details.