They're incredibly rare today, but portable girdle books were once very handy.
Used from the 14th to 17th centuries, these books were texts that their owners needed to keep close at hand: prayer books used by monks and nuns, for example, or law books used by traveling judges. Though they were valuable objects—luxuries, even—these books were meant to be consulted and read.
“These are books that needed to be specially protected because of a lot of use, a lot of wear. Most of them were probably used daily,” says Margit J. Smith, author of The Medieval Girdle Book. “How many books do you have in your collection that you use every day?”











