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| Written by | Caroll Spinney alias Oscar the Grouch |
| Illustrator | Caroll Spinney |
| Published | 1976 |
| Publisher | Western Publishing |
| Series | A Whitman Tell-A-Tale Book |
Oscar the Grouch explains all of his grouchy secrets.
This book introduced the characters Otto the Grouch and Smiling George.
It was also released as a Book-and-Record set (BR-00001), and as a Book-and-Tape set (BT-00001).