King Solomon's Passport: A Masonic Record of Quarry Work (Tools for the 21st Century Mason)

This is pretty much just a blank book for recording your visits to other lodges. You could, ostensibly, carry it around with you. Because of its size, though, you'll need to have it in hand (or a brief case) since it's far too big for your coat/shirt pocket. To me, it's a waste of money; your mileage may vary.