The contract of sale is the paradigm contract—the “master contract” as Professor Reynolds has termed it. The law of sale is covered in most University degree courses, either as a subject in its own right or, perhaps more often, as a fundamental part of courses entitled “commercial” or “consumer” law. The law of sale therefore forms a significant part of the content of books on commercial and consumer law; but the coverage in such works is, inevitably, limited in depth or partial and selective.