Buckley, Michael (2005). The Fairy Tale Detectives. (The Sisters Grimm, bk. 1) 284 pages. Grades 4-6.
Sabrina and Daphne Grimm are sisters who have been sent to live with their grandmother, whom they believed was dead. Their parents have been missing for over 2 years and they have lost hope of being reunited with them. When they arrive at their grandmother's home, Sabrina and Daphne find themselves in a fairy tale world complete with pixies, Jack (from Jack and the Beanstalk), the Three Little Pigs, and of course Prince Charming. Before they have a chance to settle in, the Grimm family is on the case of a giant who has crushed a farmer's home. But, before the sisters can learn more about this unusal world and their new family,
their grandmother is kidnapped by the giant and the Grimm sisters must save her!