In the fourth book of the Borderlands sequence, Michael, Alice, Frankie and David are working on a school local history project about lime quarries and kilns. In some obscure parish recors they find a village called Philadelphia is charted but it has since disappeared without a trace and is never mentioned by the locals. Intrigued, the four set out to search for clues to Philadelphia and what they find is terrifying. On the site they have begun to excavate they uncover a mummified body and this discovery sets off a terrifying chain of events that will take all their courage to overcome.
- ISBN10 0099400790
- ISBN13 9780099400790
- Publish Date 1 March 2001
- Publish Status Out of Print
- Out of Print 10 August 2021
- Publish Country GB
- Publisher Penguin Random House Children's UK
- Imprint Red Fox
- Format Paperback (B-Format (198x129 mm))
- Pages 144
- Language English