The first part of volume 2 examines in depth the antecedents and origins of the oratorio in Protestant Germany in the seventeenth century. It includes discussions of the Lutheran Historia, sacred dramatic dialogues, and the Lubeck Abendmusiken of Buxtehude. The second part treats the oratorio in Protestant Germany in the early eighteenth century and examines Handel, Reinhard Keiser, and J.S. Bach. The third part considers primarily the English oratorios of Handel. In most sections of A History of the Oratorio, the author has selected for special attention a few oratorios that are representative of each geographical area and period. An exception to this procedure is in the section on Handel in this volume, where all of the composer's English oratorios are treated fully with particular reference to recent specialized Handel studies.

Volume 1, The Oratorio in the Baroque Era: Italy, Vienna, Paris, and Volume 3, The Oratorio in the classical Era, expand and continue the study of oratorio history. Although this series was originally announced as a three-volume study, Smither will conclude with a fourth volume.

Originally published in 1977.