Pinning Book Documents opened from Asset Flow

I have a collection of documents in book style in an asset flow. I have it set so that users can tap to open the documents to view the documents so that they can make it bigger and easier to read. However, when you tap to open you are unable to pin the document which has made it very hard to use. Most users when they swipe to turn the page end up swiping the whole document across the screen. I noticed when the documents are set to horizontal scroll, when they are opened from the asset flow, you are able to pin it. Is there a way to allow documents in book style to be pinned when opened from an asset flow?