You may wish to change the colors of your bookshelf items to help visually distinguish resources.
From your home screen, select Bookshelf.
From My Bookshelf you can now choose the resource or folder you would like to edit by selecting the “i” button to the right.
Select Edit from the menu.
Hover over the color and you may now change it to whatever you would like. When finished making your changes, select Update.
Now you can easily customize the look of your bookshelf!