Who was the first to devote an entire book exclusively to microscopic observation?

The first person to devote an entire book exclusively to microscopic observation was Antonie van Leeuwenhoek. His work, titled "Arcana Naturae Detecta," published in the late 17th century, detailed his discoveries using the microscope. Leeuwenhoek's meticulous observations of microorganisms, bacteria, and other minute entities laid the groundwork for microbiology. His contributions significantly advanced the understanding of the microscopic world.