For book lovers, there is a chance to swap the usual day job for an altogether different role: running a working second-hand bookshop in Scotland. That is exactly what guests can do at The Open Book in Wigtown, Galloway. The unusual Airbnb pairs a self-catering apartment upstairs with a working shop below, giving visitors the keys for the duration of their stay. Your Holiday Comes With a Shop The unusual setup gives guests plenty of freedom. The…