Penguin 23003 Goodnight Gorilla Children's Book Features : A perfect, must-have book for all young childrenA book where you must solve who is letting all the zoo animals out at nightSure enjoyment for adults and children to readA must have board book for all babies. It's bedtime at the zoo, and all the animals are going to sleep. Or are they? Who's thatshort, furry guy with the key in his hand and the mischievous grin? Sneak along behind the zookeeper's back, and see who gets the last laugh in this riotous goodnight romp.