Quote:
Originally Posted by crich70
I don't remember when they changed from sewn to glued books in general but I do remember when TV guide was stapled together and how they switched to a glued binding for that. Back then the TV guide was about the same size as a Reader's Digest book. It seemed they had a lot more in it back then too than in any book of any size about what is on TV now. Of course they had better programming back then too so I guess it balances out. 
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Passports are still sewn. But they are thin and easy to handle by a sewing machine. Sewing machines that can stitch something as thick as a book are very expensive and slow.