Yes. Create another document (I’ll call it “source”) that is made up of the common pages only … let’s say 5 pages. Insert blank pages if necessary to force left/right.
In the source document, use the same parent pages as you would in the 7 target documents (In fact you could create it by “moving/duplicating” these pages from one of the target documents, which should bring along their parent page as long as it’s uniquely named). These common pages are going to come in as full-page “images” so don’t use anything on their parent pages that needs to get updated in the target document, like automatic page numbers. Instead put those in the target document and leave blank space for them in the source.
Then in one of your 7 target documents, go to one of the common pages and delete everything on the page. Choose File > Place and select the source INDD file, and in Place Options navigate to the page you want to insert. Make sure “selected page only” is chosen in the Place Options, then click OK.
With your loaded Place cursor, click to insert that page from Source into your Target document. The Links panel will show it’s a linked page. It may look like an image but when you print/PDF the live InDesign data from the Source file will be used.
Do that for all your other target files, importing page/s from the Source file as necessary.
So that’s the set-up, takes a little time and care. But NOW when you need to update one of the common pages, open the SOURCE file, update it, and save. Your target documents will show an Out of Date icon in the linked pages. Just click Update in the usual way.
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