Jurisprudence in the Common Law has owed so much to German legal theory from the days of Austin onwards that it might be expected that any major new work in German would sooner or later become known to English readers. This may no longer be true as the generation of emigre scholars, who have so enriched Anglo-American legal scholarship, are now getting older and in many cases retiring from teaching. To this may be added that fewer native English or American scholars read German now that English has virtually become the lingua franca of legal research. These may be reasons why a recent major work in legal theory does not appear to have been reviewed in English.' Josef Esser's Vorverstdndnis und Methodenwahl in der Rechtsfindung (Predisposition and Choice of Method in Finding the Law)2 is a significant study and should become known to all who are interested in judicial process. In this book Esser develops some of the thoughts first outlined in his work Grundsatz und Norm in der richterlichen Fortbildung des Privatrechts (Principle and Norm in the Judicial Development of Private Law) published in 1956, of which unfortunately no English translation is available.3 There the author demonstrated convincingly, by case-law examples, analysis and reference to the juristic literature of the major Western legal systems (Germany, France, Switzerland, Italy, Spain, England and the United States), the fundamental similarities of legal evolution by the judicial process behind the superficial differences of technique. He also emphasized the surprising similarity of solutions to the same sets of problems in legal systems which had a similar set of values by the use of apparently quite dissimilar techniques, e.g. the concept of unjust enrichment as developed in the Common Law, in French law (where there was no provision at all on this topic in the Code) and in Switzerland and Germany where Code provisions did exist. The crucial importance of the judge in this process was an evident corollary. This book had a major, though not uncontroversial, impact on Continental legal theory. Its distinctive quality for German legal