Medicine is obviously a rapidly evolving field and most medical texts receive a periodic retooling. All revisions should be as thorough and meaningful as the Seventh edition of Campbell's. The text has been sucessfully expanded where appropriate and each section further honed. Figures are elegant, pertinent, and well rendered. The references are all encompassing and as current as one can expect in a volume such as this. If there are any hesitations about updating from the sixth edition (which was also a vast improvement from the fifth) I hope to assuage them, encourage the reader and congratulate the authors.