Franklyn M. Branley was the originator of the Let's-Read-and-Find-Out Science series and the author of close to 150 popular books about scientific topics for young readers of all ages. He was Astronomer Emeritus and former Chairman of the American Museum of Natural History-Hayden Planetarium.

Giulio Maestro is the illustrator of over 100 children’s books. He has also written his own books of word play and has co-authored two I Can Read Books with his son, Marco: What Do You Hear When Cows Sing, and Other Silly Riddles and Geese Find the Missing Piece: School Time Riddle Rhymes. The Maestros live in Old Lyme, CT.