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| Written by | Ellen Weiss |
| Illustrator | Richard Walz |
| Published | 1997 |
| Publisher | Random House |
| ISBN | 0679884556 |
Horton's Lullaby is a 1997 Wubbulous World of Dr. Seuss storybook featuring Horton the Elephant and his son Morton the Elephant Bird. It is based on the episode "Horton Has a Hit."
In the book, Horton sings a lullaby to Morton to lull him to sleep.