Présentation de l'éditeur
Night and day, whether you're asleep or awake, your heart is always beating. Read and find out how your heart works and how to keep it healthy.
Biographie de l'auteur
Paul Showers wrote twenty books for the Let's-Read-and-Find-Out Science series, including favorites such as What Happens to a Hamburger? and Where Does the Garbage Go? Mr. Showers worked on the Detroit Free Press, the New York Herald Tribune, and for thirty years, the Sunday New York Times.
Holly Keller has illustrated a number of books in the Lets-Read-and-Find-Out Science series, including Be a Friend to Trees. She is also the author and illustrator of many picture books, including Island Baby and Horace.
Ms. Keller lives in West Redding, Connecticut.