We now have a Book Previewer on Bookvault, this will allow you to view both the cover and interior of your title, and compared it against our bleed and safety margins.
To access this, go to 'View your Titles' and click the file icon on the title you want to preview.
You will now see the below page;
Click the 'Book Preview' option, and it will load the below; you can now flick through all your pages, turn the bleed preview off if you'd like and generally see how your book will look once printed and trimmed.
The Book Preview is in BETA, so some bindings/features aren't fully available.
