Share 'Swap, sell or buy books???'

A conversation was held a while ago, amongst all the confusion of getting incorrect books, that a thing should be set up for swapping books.   So here it is, on a trial basis!!! It is highly possible that this will be deleted.   If you have a wrong size book, and don't want to re-buy, maybe someone else has it they are willing to swap? Or if you have any extras you want to sell, maybe someone is…