Terry walks into a bookshop. Peter, the shopkeeper, asks whether he can help him, but Terry says he just wants to browse through the books on the fiction shelves. In fact, he is simply filling in time until he meets a friend. However, he sees a book on goldmining, which interests him, takes it to the counter and says he will buy it. Peter refuses to sell it to him. Can Terry claim that, contractually, Peter must sell him the book? Does it matter what reason Peter advances for refusing to sell, for example that the price on the book is wrong, or he doesn't like Terry? What case or cases would you refer to when advising Terry?