Im working on a project that needs the functionality of a book node

The problem is I would like to change the structure of how it works

For example I would like the admin on the site to be able to create the primary node and then allow users to add nodes of some type to it (no text just a title and an image) – my problem is setting permissions

For the admin that they have access to the entire node tree and the users only have access to the nodes created (or the images that they have uploaded)

Anyone any ideas

The other option I suppose is to create a content type and allow comments to be added but I like the navigation of the book module (I may have problems with adding just and image with no body)