This book has been graded for interest at 8-12 years.

There are 56 pages in this book. This is a reference book. This book was published 2014 by B. E. S. Publishing .

Jen Green is a widely published children's nonfiction writer, specializing in natural science topics. Christiane Engel is originally from Germany, but currently works as an illustrator and children's book writer in London. This is her first project with Barefoot Books.