Chapter 7 contains perhaps the newest contribution to the history of cell theory in the book, as the work and career of Mazia have not been treated significantly by historians of science. Sherrie Lyons has produced a potentially useful survey of cell theory from its earliest days in the seventeenth century (Anton van Leeuwenhoek and Robert Hooke) using the simplest microscopes, through the introduction and improvement of the compound microscope, stains and methods of preparing specimen in the eighteenth and nineteenth centuries, through the mid-1980s and work of cell biologist Daniel Mazia (1912-1996) with the introduction of the electron microscope and molecular tools for studying the details of cell structure and function. Book Review: Sherrie Lyons, From Cells to Organisms: Re-envisioning Cell Theory: (Toronto: University of Toronto Press, 2020), 224 pp., 17 b&w illus., $39.95 Paper, ISBN: 978-1-4426-3509-8; $71.25 Cloth, ISBN: 978-1-4426-3510-4. [Extracted from the article]