"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."-- Provided by publisher.

A golden age -- Big changes -- Seller of cloth -- An eye-opening trip -- Spreading the word -- Small lake, big discovery -- A most important letter -- In the name of science -- Last letters -- The father of microbiology.