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				What is the purpose of queue all books?
			 
			 
			
		
		
		
		
			
			When I select Backup status: it says "Book metadata files remaining to be written: 0" and the options are to "Queue all books for backup" or "Close". 
 
I have not bothered to queue books since I first tried it thinking it was a step in the backup process. What is it for?
		 
		
	
		
		
		
		
		
		
		
		
		
		
	
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