The original size and location for the close window button on this spell book was not correct. It placed the close window button over the dragon's left wing.
I edited the EQUI_SpellBookWnd.xml to modify the <Button item = "SBW_DoneButton"> section.
I made the size a bit more managable and placed it directly on the dragon's nose ( between the sount and the tip. Now all you have to do is click on the dragon's nose to close the window.
Hope this sparks interest again in this great spell book.