Microbiome: The Universe Inside You

From the time we're born, we acquire bacteria, fungi, viruses, and other microbes from other people, everything we touch, and everything we eat. This makes up what some call a super-organism: The human microbiome. It includes 10 to 100 trillion microbial cells on and in the human body. The most well-known part of the human microbiome and its vital ecosystem's role in human health.

This highly visual exploration is a fascinating look at the still-mysterious human microbiome--the viruses, bacteria, fungi, and other microbes that work together to play an essential role in keeping humans healthy. The accessible text allows full-bleed images to shine throughout, including full-spread, photo-realistic illustrations that bring the world of microorganisms to life.

Written by Helene Priestley, who holds a PhD in molecular biology, the author created the book in cooperation with Dr. Purna Kashyap, director of the Microbiome Program, a Mayo Clinic research initiative that studies the microbiome's role in health. Dr. Kashyap also gives readers tips and tricks for keeping their microbiome healthy.

Mayo Clinic Press Kids creates empowering health and wellness content in partnership with pediatric experts. Proceeds from the sale of every book go to benefit important medical research and education at Mayo Clinic.

Author: Helene Priestley
Publisher: Mayo Clinic Press Kids
Published: 01/06/2026
Pages: 32
Binding Type: Paperback
Weight: 0.35lbs
Size: 9.80h x 9.80w x 0.10d
ISBN: 9798887703961
Audience: Ages 9-12

About the Author
Helene Priestley, PhD, completed her PhD in molecular biology and has worked as an editor on clinical review journals. As a children's author, she combines her experience in the lab with a passion for literacy and for educating children in STEM. She is a member of SCBWI (Society of Children's Book Writers and Illustrators).

Illustrator David Márquez has a PhD in immunology and a Master's degree in scientific illustration. His work is fueled by a passion for nature in all its forms and for visually communicating scientific knowledge.

Martin Bustamante, an Argentinian illustrator and painter, discovered his passion for drawing and painting at a young age. He has worked professionally for publishers and magazines in Argentina, the U.S., and Europe.

Purna Kashyap, M.B.B.S., is the director of the Microbiome Program at Mayo Clinic, a research initiative that studies the role of the human microbiome in health. His research aims to better understand gastrointestinal disorders to provide better treatment options for patients, especially microbiota-targeted therapies.