On the way to the zoo little Joshua--genus unknown but a genuine charmer--has nibbled away the last of the INSTRUCTIONS FOR (his) FEEDING AND CARE, the part that tells how ""to get Joshua to go to sleep."" At bedtime zookeeper Mr. Benjamin lies down and feigns sleep, and Joshua in his basket copies him exactly--to the extent of opening his eyes when Mr. Benjamin peeks. Homer, the zoo's messenger-bird, is sent for help, but first the raccoon (who ""rolled himself into a ball and threw his tail over his eyes""), then the turtle (who ""pulled himself completely into his shell""), and the ostrich have the same effect on Joshua: he rolls up or scrunches down or covers his head like they do, and looks up when they do. But Samuel the sloth, ""the animal-expert on sleep,"" really falls asleep--and so do they all, even Joshua. A pert little comment on pretense, engagingly drawn and amusingly detailed (see especially the changing picture over Mr. Benjamin's couch).