This book is about a scientist who studies things that you cannot see with a naked eye. He studies these things with microscopes. The scientist has figured out many things that we didn't know before.
My favorite part in the book is when I learned about all the different types of plants and pollens that people are allergic to.
I would recommend this book to boys and girls who are 10 and up and like science.
I would rate this book with *** stars out of ***** stars.
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