How to best paginate a book

Hi,

Here's what I have: A book comprising seven files. But, the files aren't so much chapters as chunks of content.

What I want to do: If content in a file ends on an odd page, start the next file on the next even page.

What doesn't work: I can use chapter-level pagination to delete empty pages and set the starting side as next available. So, if file (chapter) 1 ends on page 7, then the beginning of the next file will indeed be page 8. BUT, the beginning of the next file uses a right-hand master page, so it uses a right page layout for a left page.

Thoughts? Thanks.