Abby and the Mystery Baby
| Series | The Baby-Sitters Club Mysteries |
| Publisher | Scholastic Inc. |
| Cover Art by | Hodges Soileau |
| Copyright Holder | Ann M. Martin |
| Format | Paperback |
| Language | English |
| Location | New York |
| First Printing | 1997-02 |
| Copyright | 1997 |
| Pages / Font | 137 pages |
| Series Number | 28 |
| ISBN 10 | 0-590-69176-7 |
| Barcode (EAN) | 9 780590 691765 |
| EAN 5 | 50399 |
| Printer's Key | 12 11 10 9 8 7 6 5 4 3 2 1 7 8 9/9 0 1 2/0 |
| Barcode (UPC) | 0 78073 00399 0 |
| UPC 5 | 69176 |
| Other | RL4 008-012 |
| Notes | First Scholastic printing, February 1997 |
Added by almoadhadi