There are min&max pages for books, below or above which books cannot be bound. For a5/a4 max will be 800pages. The way we have thought about it is that you can

There are min&max pages for books, below or above which books cannot be bound. For a5/a4 max will be 800pages. The way we have thought about it is that you can add all the “to print” content in the 'my articles' page, then create collections (i.e books to be printed) and add the articles into them accordingly. We have thought about integrating with bookmark managers, but a core issue with that, is that we do not have access to paid content users have/do not what to provide access to content to users that shouldn’t have. Our implementation is by snapshot-ing via our extension a user’s tab, hence providing content that we know for a fact a user has access.