How many bones do I have in my body? What does my heart do? And why do we breathe? Find out in this fact-filled book, the first in a new non-fiction series for children aged 5+. Each book answers 100 questions in a simple and informative way, and has more than 70 lift-flaps to open.

HEATHER ALEXANDER was born in New York City, and now lives in New Jersey. She began her career editing children's books such as Goosebumps and Fear Street, before moving into writing. She has written over 40 books for children.

ANDRES LOZANO is an illustrator from Madrid, who currently lives in London. He lists his inspirations as nature, architecture, Franco-Belgian comics and film noir. His work is characterised by overlayed colors, textures and strong line work. He has worked with The Wall Street Journal, The New York Times, The Sunday Times, and Anorak.

"Curious kids full of questions about their bodies will find many answers in this installment in the Life on Earth series. Each sturdy two-page spread focuses on a particular organ or function, and scattered around the cartoonish images of bodies and internal organs are plenty of questions, which appear on flaps that, when lifted, reveal the answers. Skeletal structure, muscles, digestion, the cardiovascular system, and the brain, with an emphasis on senses, all get lively coverage here, and the playful illustrations and inquisitive tone keep it from becoming too dry. Though some answers are a bit vague, they’re informative enough for the target age group. With an interactive approach, colorful page spreads, and plenty of nuggets of useful facts, this browser-friendly volume should be useful for both classrooms and casual reading."
— Sarah Hunter, for Booklist

"The dense amount of fascinating facts makes (this book) appropriate for curious beginners as well as those writing basic reports. The illustrations are bold and colorful, in a folk art style." - Jessica Bushore, Xenia, OH, for School Library Journal