@
readin - I suspect you created a .LNK in place by right clicking the folder and selecting Create Shortcut, and then you DnD'd that .LNK file into the Book Details. The reason I create them on the desktop is because it gets cleaned at end of day.
If I created them in place I'm likely to leave them there gathering dust and inviting future confusion as in - 'what the **** is that doing there?'
BR