After his best friend is shot and killed, fourteen-year-old Langston borrows his science teacher's time machine and travels from Los Angeles in 2010 to Oxford, England, in 1278 to try to prevent Roger Bacon from publishing his formula for gunpowder.
- ISBN10 0689868766
- ISBN13 9780689868764
- Publish Date 1 December 2005
- Publish Status Out of Print
- Out of Print 5 July 2010
- Publish Country GB
- Imprint Margaret K. McElderry Books
- Pages 224
- Language English