Here are some of his key works:
* "The Earth's Earliest Biosphere: Its Origin and Evolution" (2000): This book is considered a foundational text in the study of early life. It covers the history of life from its earliest origins to the emergence of the first multicellular organisms.
* "Microfossils of the Early Archean Apex Chert: New Evidence of the Antiquity of Life" (1993): This paper describes the discovery of microfossils in the Apex Chert, dating back 3.5 billion years, providing significant evidence for the early existence of life on Earth.
* "Fossil Evidence of Archaean Life" (1999): This publication reviews the available fossil evidence for life in the Archean eon, highlighting the challenges and opportunities of studying such ancient life forms.
* "The Fossil Record: A Palaeontological Perspective" (2016): This book delves into the history of paleontology, focusing on the techniques and interpretations used to study fossils and understand the history of life on Earth.
Besides these books and articles, Schopf has also published numerous other papers on topics related to paleontology, geology, and astrobiology. His work has contributed significantly to our understanding of the early history of life on Earth and the search for life beyond our planet.
If you are interested in learning more about J. William Schopf's work, I recommend searching online for his publications or visiting his website.