It is not customary to comment at length on each new edition of a standard text or monograph. Copeman's treatise, however, is one of the exceptions because of the subject matter and the incidence of the diseases discussed. A complete rewriting every seven years is frequent enough to incorporate new items of significance and, at the same time, is less of a chore to the senior author than would be a more frequent revision. In this current edition Copeman was assisted by 24 of the best-informed and clinically wise physicians in the United Kingdom who concern themselves with bones and joints. We may mention a few, even at the expense of apparent favoritism: Lord Cohen of Liverpool, Bywaters of Taplow, Kellgren of Manchester, Kersley of Bath, and Sir Reginald Watson-Jones of London, all of them teachers, investigators, and clinicians who insure quality without compromise. The discussions will interest American physicians,