To create a folder that has restricted access. Firstly create a new folder on the bookcase. Open this folder and then click on the access tab at the top of the bookcase. A list of the readers will be shown, these are the ones who have access, will be able to see the files on their tablet.
To add new readers to this folder, click on the add and select the readers you would like to see this folder.
To remove a reader's access, click on the box to the left of the reader's name and then click on the removed selected.