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| Written by | Sarah Albee |
| Illustrator | Carol Nicklaus |
| Published | 1996 |
| Publisher | Reader's Digest |
| Series | Sesame Street ABCs |
| ISBN | B006RFD0E |
Diddly Diddly D! is a Sesame Street storybook. The book is the "D" volume of the Sesame Street ABCs, a set of alphabet books published by Reader's Digest in 1996.
The book is a silly rhyming tale involving a quartet of monsters (including Cookie Monster and Herry Monster).
