Keats, Ezra Jack. A letter to Amy / Ezra Jack Keats. - New York : Harper & Row, c1968. - <36> p. : col. ill. When Peter plans a birthday party and writes an invitation to his special friend Amy, he goes out to mail it but something extraordinary happens on the way. ISBN: 0064430634 LCCN: 68024329 Subjects--Topical Terms: Friendship--FictionLetter writing--Fiction LC Class. No.: PZ7.K2253 / Le Dewey Class. No.: E