A collection of the various papers and lectures of Professor Willis E. Lamb, Jr (who was awarded the Nobel Prize in Physics in 1955 for his precise measurement of what came to be called the Lamb Shift) on the fundamental, fascinating and fashionable subject of the interpretation of quantum mechanics. Professor Lamb began to bring his insights to this subject since he first started publishing his papers in the field in 1969. In a detailed editorial annotation on the Scientific Work of Willis E. Lamb, Jr (based on extensive conversations with Professor Lamb), Jagdish Mehra, a historian of modern physics, provides a survey of Professor Lamb's diverse contributions to the various fields of fundamental physics and the context in which they were made.