When Justice Jack, a self-appointed superhero, begins trying to track down the missing Mrs. Wedgewod and some stolen cash, the older folks in Santa Martina are delighted but Sammy knows it will be up to her to really solve the mystery.
- ISBN10 0375870520
- ISBN13 9780375870521
- Publish Date 10 July 2012 (first published 1 January 2012)
- Publish Status Out of Stock
- Publish Country US
- Imprint Alfred A. Knopf Books for Young Readers
- Format Hardcover
- Pages 294
- Language English