William Ivan Martin Jr. (March 20, 1916 – August 11, 2004) was an American educator, publishing executive, and author of more than 300 children's books including The Sounds of Mystery, Chicka Chicka Boom Boom (co-authored with John Archambault), Brown Bear, Brown Bear, What Do You See?, Baby Bear, Baby Bear, What Do You See?, Panda Bear, Panda Bear, What Do You See?, and Polar Bear, Polar Bear, What Do You Hear? (all collaborated with illustrator Eric Carle). The Bill Martin Jr. Award, which is the Kansas state award for best children's picture book, was established in his honor in 1996.[1] -Wikipedia