"For fans of the "Who Was" series, this lively, accessible, and full-color chapter book biography shows how a self-taught scientist was the first to observe the microbial life in and around us. By building his own microscope, Antony van Leeuwenhoek advanced humanity's understanding of our oft-invisible world around us."--

Ages 7-10.|||Grades 4 to 6.|||juvenile

by Lori Alexander ; illustrated by Vivien Mildenberger.

Includes bibliographical references (pages 90-91) and index.