The easiest way to get to the folder of a 'shelved' book is via the initial Pathagoras Document Assembly screen.
1.Click the Document Assembly icon. The Libraries and Books screen will appear.
2.Click once on the book you wish to display. The screen will expand.
3.Click the "Display Folder" option.
4.Click the Next button and the target folder will display. (Double clicking the "Display Folder" button will combine steps 3 & 4.)