Anastasia Suen is the author of more than 350 books, many of which explore science and technology for young readers. Anastasia is also a LibrarySparks and Booklist columnist and blogger, a children's literature consultant, a freelance editor, and a teacher. www.asuen.com Ryan O'Rourke has a talent for drawing machinery for young children. He has illustrated picture books about trains ( Alphabet Trains ), trucks ( Alphabet Trucks ), and spacecraft ( Eight Days Gone ), as well as many other topics. He is also the author and illustrator of Bella Lost and Found (HarperCollins). www.

ryanorourke.com.